'Obligatory' association between A and D cells demonstrated by bipolar islets of neonatal pancreas.
D005260:Female; D005455:Fluorescent Antibody Technique; D005934:Glucagon / Q000032:analysis; D006801:Humans; D007231:Infant, Newborn; D007232:Infant, Newborn, Diseases / Q000473:pathology; D007328:Insulin / Q000032:analysis; D007515:Islets of Langerhans / Q000166:cytology / Q000473:pathology*; D013004:Somatostatin / Q000032:analysis
D007328:Insulin; D013004:Somatostatin; D005934:Glucagon