A dear friend in Madrid is in a coma with Covid-19. He’s under 40 and was in excellent condition. So much for it only killing the old and infirm. Why are NYC bars and restaurants still open?

NEW: CDC guidance on masks expected to change in next 10 days. Americans will be advised to wear masks in everyday life. Current recommendation is for high-risk groups only.

Good grandson!

What does a mask do? Blocks respiratory droplets coming from your mouth and throat. Two simple demos: First, I sneezed, sang, talked & coughed toward an agar culture plate with or without a mask. Bacteria colonies show where droplets landed. A mask blocks virtually all of them.

Happy birthday, China!

Great toy for teaching cryo-EM

COVID thrives in big gatherings. Here’s how dangerous it is. 7 people who DID NOT even attend a wedding in August died. We all must take care of each other.

COVID not only kills — it can also lead to devastating, long-term effects. “Long-haulers" still struggle with symptoms for months after catching COVID. Take COVID seriously. Even if you're younger or in good health.

My message to my fellow Americans and friends around the world following this week's attack on the Capitol.

. PNASNews Asymmetric protonation of glutamate residues drives a preferred transport pathway in EmrE, Jianping Li Jianping Li Ampon Sae Her Callie Saeher Nathaniel J. Traaseth* Nate Traaseth NYU Chemistry pnas.org/content/118/41… #NMRchat #NMR

Kudos to Jianping Li for leading this effort to reveal the proton-coupling mechanism of the NorA transporter from S. aureus. It was a fun collaboration among Yan Li, Akiko Koide, Huihui Kuang, Victor J. Torres, Shohei Koide, and Da-Neng Wang. #cryoem #transporters #mdsimulations

Jianping Li, Callie Saeher and colleagues in Nate Traaseth reveal conformational dynamics underlie the drug recognition mechanism by the efflux transporter EmrE #nmr #membraneproteins nature.com/articles/s4146…