“Carol and Douglas Hofstadter in a mutual nose touching, forming a (metaphorical) “strange loop” in July of 1987 in the Wallowa Mountains in Eastern Oregon.”

Image credit: Peter Rimbey

Via: http://www.time.com/time/magazine/article/0,9171,1599720,00.html

(And I’m pretty sure it’s in I Am a Strange Looptoo.)

Image 1: B-factor plot for 1AV1 truncated human apolipoprotein A-I

Source: http://www.xray.utmb.edu/#BPATCH

Caption: “B-factor plot of 1AV1, refined at 4 Å using the PMB B-factor patch for isotropic B-factor restraints. Note that even the side-chain b-factors are well-behaved, and that the molecular motions are modeled more accurately by these individual B-factors than they could be by a series of group B-factors.”

What is a B-factor plot? I don’t know, but these folks say: “Blue means helix, red means strand and green means turns and random coil.”

Image 2: Another view of 1AV1 structure

Source and more info: http://www.rcsb.org/pdb/explore.do?structureId=1av1

What is apolipoprotein A1? According to Wikipedia, it’s “the major protein component of high density lipoprotein (HDL) in plasma” i.e. the good cholesterol. It helps clear fats! Good job, apo A-I!