Assertion: amino acid | /r/MadeOf | sulfur
Facets:
Source sentences:
text: In glycine, the simplest amino acid, the R group is a hydrogen atom, but in all other amino acids it is contains one or more carbon atoms bonded to hydrogens, and may contain other elements such as sulfur, oxygen or nitrogen.
text: Amino acids are made of the amino group (NH 2 ), carboxyl group (COOH) and a side chain containing carbon, hydrogen or oxygen; two amino acids (cysteine and methionine) also contain sulfur and one (selenocysteine)