Assertion: cysteine | /r/HasAspect | its side chain
Facets:
Source sentences:
text: Cysteine has its side chain in the same geometric position as the other amino acids, but the R/S terminology is reversed because of the higher atomic number of sulfur compared to the carboxyl oxygen gives the side chain a higher priority by the Cahn–Ingold–Prelog rules, whereas the atoms in other side chains give them lower priority compared to the carboxyl group.