Klara Christensen
@klarac.bsky.social
Cell & Molecular MS Student at San Francisco State University.
Reposted by Klara Christensen
We have wondered what a complex archaeal cell might look like ever since 2014. It’s been a long road (and the journey is far from over), but it’s a good time to pause for breath and look. These Asgard archaeal cells are a surprise! And that is the joy of being a cell biologist.
November 7, 2025 at 11:02 AM
We have wondered what a complex archaeal cell might look like ever since 2014. It’s been a long road (and the journey is far from over), but it’s a good time to pause for breath and look. These Asgard archaeal cells are a surprise! And that is the joy of being a cell biologist.
Me impatiently waiting for the @biorxiv-microbiol.bsky.social bot to post a preprint I'm on so I can promote it.
November 6, 2025 at 3:36 AM
Me impatiently waiting for the @biorxiv-microbiol.bsky.social bot to post a preprint I'm on so I can promote it.
Reposted by Klara Christensen
Sub-cellular chemical mapping in bacteria using correlated cryogenic electron and mass spectrometry imaging
Congrats Hannah Ochner and authors on this important paper! Strong collaboration with @kiranrpatil.bsky.social
www.biorxiv.org/cgi/content/...
@mrclmb.bsky.social @wellcometrust.bsky.social
Congrats Hannah Ochner and authors on this important paper! Strong collaboration with @kiranrpatil.bsky.social
www.biorxiv.org/cgi/content/...
@mrclmb.bsky.social @wellcometrust.bsky.social
August 31, 2025 at 6:44 PM
Sub-cellular chemical mapping in bacteria using correlated cryogenic electron and mass spectrometry imaging
Congrats Hannah Ochner and authors on this important paper! Strong collaboration with @kiranrpatil.bsky.social
www.biorxiv.org/cgi/content/...
@mrclmb.bsky.social @wellcometrust.bsky.social
Congrats Hannah Ochner and authors on this important paper! Strong collaboration with @kiranrpatil.bsky.social
www.biorxiv.org/cgi/content/...
@mrclmb.bsky.social @wellcometrust.bsky.social
Reposted by Klara Christensen
Gavin Newsom is anti-trans and I will never, ever vote for him.
Gavin Newsom suggesting that 25 years of age is too young to transition and agreeing to right-wing entryism of concern trolling about trans people in sports. This is your opposition leader?
I will never vote for Gavin Newsom anyone who thinks trans people are actual humans will follow suit.
I will never vote for Gavin Newsom anyone who thinks trans people are actual humans will follow suit.
August 24, 2025 at 12:04 AM
Gavin Newsom is anti-trans and I will never, ever vote for him.
"We support research, as long as your study is politically favorable for us."
August 15, 2025 at 7:42 PM
"We support research, as long as your study is politically favorable for us."
Had a great time at #phages2025 last week! It was my first notable conference I went solo to. Thank you all for the many great talks and all the new people I met at all levels of research. I hope to be back again in a year or two with a project worthy of a talk!
August 14, 2025 at 2:23 PM
Had a great time at #phages2025 last week! It was my first notable conference I went solo to. Thank you all for the many great talks and all the new people I met at all levels of research. I hope to be back again in a year or two with a project worthy of a talk!
Reposted by Klara Christensen
#microsky
We challenge the long-standing view that peptidoglycan alone protects cells from bursting.
Our study shows that the periplasm — enclosed by OM–PG connections — acts as a pressure buffer essential for osmoprotection in Gram-negative bacteria.
📄 www.nature.com/articles/s41...
We challenge the long-standing view that peptidoglycan alone protects cells from bursting.
Our study shows that the periplasm — enclosed by OM–PG connections — acts as a pressure buffer essential for osmoprotection in Gram-negative bacteria.
📄 www.nature.com/articles/s41...
Peptidoglycan–outer membrane attachment generates periplasmic pressure to prevent lysis in Gram-negative bacteria - Nature Microbiology
Outer membrane attachment to peptidoglycan enables periplasmic pressure to build up and counter cytoplasmic turgor pressure, preventing lysis during osmotic challenges in Escherichia coli.
www.nature.com
July 29, 2025 at 1:23 PM
#microsky
We challenge the long-standing view that peptidoglycan alone protects cells from bursting.
Our study shows that the periplasm — enclosed by OM–PG connections — acts as a pressure buffer essential for osmoprotection in Gram-negative bacteria.
📄 www.nature.com/articles/s41...
We challenge the long-standing view that peptidoglycan alone protects cells from bursting.
Our study shows that the periplasm — enclosed by OM–PG connections — acts as a pressure buffer essential for osmoprotection in Gram-negative bacteria.
📄 www.nature.com/articles/s41...
Reposted by Klara Christensen
My latest for American Scientist Magazine helps give scientists the tools to fight back against politicized charges that our research is silly or pointless- tools that will work whether you’re asked “why are we funding this” from your asshole uncle at Thanksgiving or an asshole US Senator.
🧪🌎
🧪🌎
“Why Are We Funding This?”
Long-standing myths about “silly science” have contributed to the reckless slashing of government-supported research.
www.americanscientist.org
June 17, 2025 at 9:47 PM
My latest for American Scientist Magazine helps give scientists the tools to fight back against politicized charges that our research is silly or pointless- tools that will work whether you’re asked “why are we funding this” from your asshole uncle at Thanksgiving or an asshole US Senator.
🧪🌎
🧪🌎
Reposted by Klara Christensen
Not all persister bacteria are dormant! 🦠
Single-cell imaging of over a million #EColi shows that many antibiotic-resistant persisters were actively growing before drug exposure. Persistence appears to be more dynamic than once thought.
buff.ly/04T4L1k
Single-cell imaging of over a million #EColi shows that many antibiotic-resistant persisters were actively growing before drug exposure. Persistence appears to be more dynamic than once thought.
buff.ly/04T4L1k
June 6, 2025 at 8:21 AM
Not all persister bacteria are dormant! 🦠
Single-cell imaging of over a million #EColi shows that many antibiotic-resistant persisters were actively growing before drug exposure. Persistence appears to be more dynamic than once thought.
buff.ly/04T4L1k
Single-cell imaging of over a million #EColi shows that many antibiotic-resistant persisters were actively growing before drug exposure. Persistence appears to be more dynamic than once thought.
buff.ly/04T4L1k
Reposted by Klara Christensen
The Trump administration is working with private companies like Palantir to create detailed reports on every American, which could help them weaponize our personal information in their quest to deport immigrants and punish critics.
This is a huge threat to our constitutional rights.
This is a huge threat to our constitutional rights.
Trump Taps Palantir to Compile Data on Americans
www.nytimes.com
May 31, 2025 at 5:45 PM
The Trump administration is working with private companies like Palantir to create detailed reports on every American, which could help them weaponize our personal information in their quest to deport immigrants and punish critics.
This is a huge threat to our constitutional rights.
This is a huge threat to our constitutional rights.
Reposted by Klara Christensen
Malinowski: A couple of years ago, Vance gave a speech.. The title was universities are the enemy. He said explicitly, we cannot achieve anything in this country as a conservative movement unless we aggressively go after the universities. That's what they're doing right now
May 24, 2025 at 4:06 AM
Malinowski: A couple of years ago, Vance gave a speech.. The title was universities are the enemy. He said explicitly, we cannot achieve anything in this country as a conservative movement unless we aggressively go after the universities. That's what they're doing right now
Reposted by Klara Christensen
"Women are PIs on 58% of the canceled grants, although they are PIs on only 34% of all active NSF grants.
Similarly, Blacks are PIs on 17% of the terminated grants, although they make only 4% of the total pool. Hispanic PIs and those with disabilities were twice as likely to lose a grant."
Similarly, Blacks are PIs on 17% of the terminated grants, although they make only 4% of the total pool. Hispanic PIs and those with disabilities were twice as likely to lose a grant."
Another scoop from Jeff Mervis (@policyhound.bsky.social): NSF's ~1400 grant terminations have disproportionately affected PIs from groups underrepresented in science: women, racial & ethnic minorities, & those with disabilities. 1/3
www.science.org/content/arti...
www.science.org/content/arti...
Trump officials take steps toward a radically different NSF
Efforts to shrink staff, budget, and focus have alarmed members of Congress
www.science.org
May 13, 2025 at 10:09 PM
"Women are PIs on 58% of the canceled grants, although they are PIs on only 34% of all active NSF grants.
Similarly, Blacks are PIs on 17% of the terminated grants, although they make only 4% of the total pool. Hispanic PIs and those with disabilities were twice as likely to lose a grant."
Similarly, Blacks are PIs on 17% of the terminated grants, although they make only 4% of the total pool. Hispanic PIs and those with disabilities were twice as likely to lose a grant."
Reposted by Klara Christensen
The US administration is eroding the freedoms on which the nation’s success has been based
https://go.nature.com/4jRfcfs
https://go.nature.com/4jRfcfs
US researchers must stand up to protect freedoms, not just funding
Curtailment of freedoms and disregard for the rule of law in the United States is destroying the ability of science to serve the nation’s, and the world’s, interests. Researchers can take action.
go.nature.com
May 13, 2025 at 2:32 PM
The US administration is eroding the freedoms on which the nation’s success has been based
https://go.nature.com/4jRfcfs
https://go.nature.com/4jRfcfs
Reposted by Klara Christensen
"Do you support reducing federal funding for medical research?"
21% support, 77% OPPOSE
www.washingtonpost.com/politics/202...
21% support, 77% OPPOSE
www.washingtonpost.com/politics/202...
Trump approval sinks as Americans criticize his major policies, poll finds
President Donald Trump’s 100 days poll finds a lower approval rating, growing opposition to his agenda and opposition to many of his major initiatives.
www.washingtonpost.com
April 27, 2025 at 3:20 PM
"Do you support reducing federal funding for medical research?"
21% support, 77% OPPOSE
www.washingtonpost.com/politics/202...
21% support, 77% OPPOSE
www.washingtonpost.com/politics/202...
Reposted by Klara Christensen
⛔ NIH ended ALL of my grants mid-project, given LGBTQ health focus 🏳️🌈
⚖️ So what am I doing? Suing RFK, Jr.
As one team member shared in this story👇: "The threats to our work don’t just make me fear for my career — they make me fear for my safety.“
#SaveDemocracy #SupportScience #PublicHealth
⚖️ So what am I doing? Suing RFK, Jr.
As one team member shared in this story👇: "The threats to our work don’t just make me fear for my career — they make me fear for my safety.“
#SaveDemocracy #SupportScience #PublicHealth
Harvard Medical researcher sues NIH for cutting grant to study LGBTQ mental health
"This is not just an attack on the LGBTQ community — it is a blow to the integrity of science and the health of every American," a Harvard Medical School associate professor studying the mental…
www.masslive.com
April 27, 2025 at 2:24 PM
⛔ NIH ended ALL of my grants mid-project, given LGBTQ health focus 🏳️🌈
⚖️ So what am I doing? Suing RFK, Jr.
As one team member shared in this story👇: "The threats to our work don’t just make me fear for my career — they make me fear for my safety.“
#SaveDemocracy #SupportScience #PublicHealth
⚖️ So what am I doing? Suing RFK, Jr.
As one team member shared in this story👇: "The threats to our work don’t just make me fear for my career — they make me fear for my safety.“
#SaveDemocracy #SupportScience #PublicHealth
The only mentioning "young men" is sending off lots of red flags.
Mike Johnson on Medicaid: "What we've talked about is returning work requirements ... you return the dignity of work to young men who need to be out working instead of playing video games all day. We have a lot of fraud, waste, and abuse in Medicaid."
April 10, 2025 at 3:58 PM
The only mentioning "young men" is sending off lots of red flags.
Reposted by Klara Christensen
The massive changes in US research brought about by the new administration of President Donald Trump are causing many scientists in the country to rethink their lives and careers
https://go.nature.com/41OhAgK
https://go.nature.com/41OhAgK
75% of US scientists who answered Nature poll consider leaving
More than 1,600 readers answered our poll; many said they were looking for jobs in Europe and Canada.
go.nature.com
March 27, 2025 at 2:14 PM
The massive changes in US research brought about by the new administration of President Donald Trump are causing many scientists in the country to rethink their lives and careers
https://go.nature.com/41OhAgK
https://go.nature.com/41OhAgK
Big shout out to
✨♥️Myxococcus llanfairpwllgwyngyllgogerychwyrndrobwllllantysiliogogogochensis♥️✨ for messing up my figure.
✨♥️Myxococcus llanfairpwllgwyngyllgogerychwyrndrobwllllantysiliogogogochensis♥️✨ for messing up my figure.
March 25, 2025 at 11:11 PM
Big shout out to
✨♥️Myxococcus llanfairpwllgwyngyllgogerychwyrndrobwllllantysiliogogogochensis♥️✨ for messing up my figure.
✨♥️Myxococcus llanfairpwllgwyngyllgogerychwyrndrobwllllantysiliogogogochensis♥️✨ for messing up my figure.
Reposted by Klara Christensen
So on March 9, a French scientist, on a visa to attend a conference in Houston, was denied entry to the US and subsequently expelled because his phone had messages decrying scientific policies put forward by the Trump administration: www.lemonde.fr/internationa...
Etats-Unis : un chercheur français refoulé pour avoir exprimé « une opinion personnelle sur la politique menée par l’administration Trump »
Le ministre de la recherche français a dit sa « préoccupation », mercredi, après cette décision des autorités américaines. Le chercheur du CNRS aurait subi un contrôle aléatoire à son arrivée, avant q...
www.lemonde.fr
March 19, 2025 at 6:31 PM
So on March 9, a French scientist, on a visa to attend a conference in Houston, was denied entry to the US and subsequently expelled because his phone had messages decrying scientific policies put forward by the Trump administration: www.lemonde.fr/internationa...
Reposted by Klara Christensen
@osman-lab.bsky.social < is that you > @osman_lab on 𝕏 ?
@felix_thoma on 𝕏 Apr 25, 2022
"Mitochondrial dynamics in budding yeast. A picture was taken every 3 min for 5 h. I used mKate2 targeted to the mitos, and imaged the cells in a microfluidic chamber with a Nikon Ti2e Eclipse"
need this here!
@felix_thoma on 𝕏 Apr 25, 2022
"Mitochondrial dynamics in budding yeast. A picture was taken every 3 min for 5 h. I used mKate2 targeted to the mitos, and imaged the cells in a microfluidic chamber with a Nikon Ti2e Eclipse"
need this here!
December 5, 2024 at 11:06 AM
@osman-lab.bsky.social < is that you > @osman_lab on 𝕏 ?
@felix_thoma on 𝕏 Apr 25, 2022
"Mitochondrial dynamics in budding yeast. A picture was taken every 3 min for 5 h. I used mKate2 targeted to the mitos, and imaged the cells in a microfluidic chamber with a Nikon Ti2e Eclipse"
need this here!
@felix_thoma on 𝕏 Apr 25, 2022
"Mitochondrial dynamics in budding yeast. A picture was taken every 3 min for 5 h. I used mKate2 targeted to the mitos, and imaged the cells in a microfluidic chamber with a Nikon Ti2e Eclipse"
need this here!
Some photos from the Oakland Zoo.
March 16, 2025 at 7:42 PM
Some photos from the Oakland Zoo.
We have reached the stage in the collapse of this country where plainly open corruption by the most powerful person in the country is seen as not a big enough issue. Beyond saving.
March 11, 2025 at 8:30 PM
We have reached the stage in the collapse of this country where plainly open corruption by the most powerful person in the country is seen as not a big enough issue. Beyond saving.
Reposted by Klara Christensen
I made easy-to-print posters for the @standupforscience.bsky.social march on March 7th.
Today I added two posters specifically for @ucsanfrancisco.bsky.social and @sfstatebio.bsky.social @sfsupinc.bsky.social (I can't find all the handles I want)
abetterscientist.wordpress.com/2025/03/01/f...
Today I added two posters specifically for @ucsanfrancisco.bsky.social and @sfstatebio.bsky.social @sfsupinc.bsky.social (I can't find all the handles I want)
abetterscientist.wordpress.com/2025/03/01/f...
March 2, 2025 at 9:33 PM
I made easy-to-print posters for the @standupforscience.bsky.social march on March 7th.
Today I added two posters specifically for @ucsanfrancisco.bsky.social and @sfstatebio.bsky.social @sfsupinc.bsky.social (I can't find all the handles I want)
abetterscientist.wordpress.com/2025/03/01/f...
Today I added two posters specifically for @ucsanfrancisco.bsky.social and @sfstatebio.bsky.social @sfsupinc.bsky.social (I can't find all the handles I want)
abetterscientist.wordpress.com/2025/03/01/f...
Reposted by Klara Christensen
Welcome to the Bluesky account for Stand Up for Science 2025!
Keep an eye on this space for updates, event information, and ways to get involved. We can't wait to see everyone #standupforscience2025 on March 7th, both in DC and locations nationwide!
#scienceforall #sciencenotsilence
Keep an eye on this space for updates, event information, and ways to get involved. We can't wait to see everyone #standupforscience2025 on March 7th, both in DC and locations nationwide!
#scienceforall #sciencenotsilence
February 12, 2025 at 5:04 PM
Welcome to the Bluesky account for Stand Up for Science 2025!
Keep an eye on this space for updates, event information, and ways to get involved. We can't wait to see everyone #standupforscience2025 on March 7th, both in DC and locations nationwide!
#scienceforall #sciencenotsilence
Keep an eye on this space for updates, event information, and ways to get involved. We can't wait to see everyone #standupforscience2025 on March 7th, both in DC and locations nationwide!
#scienceforall #sciencenotsilence
Reposted by Klara Christensen
The NIH continues to be fully halted. 11/11 study sections canceled today, which includes the study section my grant was meant to be reviewed at. This is never ending and so damaging.
www.csr.nih.gov/RevPanelsAnd...
www.csr.nih.gov/RevPanelsAnd...
Review Dates
www.csr.nih.gov
February 24, 2025 at 4:13 PM
The NIH continues to be fully halted. 11/11 study sections canceled today, which includes the study section my grant was meant to be reviewed at. This is never ending and so damaging.
www.csr.nih.gov/RevPanelsAnd...
www.csr.nih.gov/RevPanelsAnd...