title: Derivation of carboxyl groups for the 'masked metachromasia' of canine C cells by hydrolysis of polypeptides at the aspartyl group.
mesh_terms: D000818:Animals; D001224:Aspartic Acid; D004285:Dogs; D006868:Hydrolysis; D010455:Peptides; D013194:Staining and Labeling; D013961:Thyroid Gland / Q000166:cytology*
chemical_list: D010455:Peptides; D001224:Aspartic Acid