Source:http://linkedlifedata.com/resource/umls/id/C0033666
MSH: Any of various enzymatically catalyzed post-translational modifications of PEPTIDES or PROTEINS in the cell of origin. These modifications include carboxylation; HYDROXYLATION; ACETYLATION; PHOSPHORYLATION; METHYLATION; GLYCOSYLATION; ubiquitination; oxidation; proteolysis; and crosslinking and result in changes in molecular weight and electrophoretic motility.,CSP: normal biosynthetic reactions occurring after polypeptide chain assembly at the ribosome; for experimental modifications, use PROTEIN ENGINEERING or other term.,GO: Any protein maturation process achieved by the cleavage of a peptide bond or bonds within a protein. Protein maturation is the process leading to the attainment of the full functional capacity of a protein. [GOC:curators, GOC:jl, GOC:jsg],GO: The process of covalently altering one or more amino acids in a protein after the protein has been completely translated and released from the ribosome. [GOC:jsg],NCI: The enzymatic processing of a polypeptide chain after translation from mes