has part has part has_part peptide Peptid peptidos Peptide Amide derived from two or more amino carboxylic acid molecules (the same or different) by formation of a covalent bond from the carbonyl carbon of one to the nitrogen atom of another with formal loss of water. The term is usually applied to structures formed from alpha-amino acids, but it includes those derived from any amino carboxylic acid. X = OH, OR, NH2, NHR, etc. peptido chebi_ontology 0 CHEBI:14753 peptides KEGG:C00012 (C2H2NOR)nC2H3NOR CHEBI:25906 CHEBI:7990 CHEBI:16670 amino-acid residue carboxamide organic amino compound peptide zwitterion