Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Protein visualisation options. a Three of the six rotamers of the residue phenylalanine, indicated by colours blue, orange and green. b PDB entry 1REI, (left) residue Gln90 un-flipped and (right) flipped. The un-flipped situation shows an energetically unfavourable close contact (in white numbers) between two hydrogens. c Display of electron density for PDB file 2ETE at contour level 2.0
