Term Name:	O-(N-acetyl-alpha-D-galactosaminyl)-L-serine residue
Synonyms:	-[GalNAc(alpha1->O)]Ser-, GalNAc alpha 1-O-Ser, N-acetyl-alpha-D-galactosaminyl-L-serine residue, O-(2-acetamido-2-deoxy-alpha-D-galactopyranosyl)-L-serine residue, Tn antigen
Definition:	An L-alpha-amino acid residue derived from O-(N-acetyl-alpha-D-galactosaminyl)-L-serine.
Ontology:	ChEBI [CHEBI:53604]  ( EBI )