The function of ENSG00000100604 (CHGA, chromogranin A) is as follows. [Pancreastatin]: Strongly inhibits glucose induced insulin release from the pancreas. [Catestatin]: Inhibits catecholamine release from chromaffin cells and noradrenergic neurons by acting as a non-competitive nicotinic cholinergic antagonist (PubMed:15326220). Displays antibacterial activity against Gram-positive bacteria S.aureus and M.luteus, and Gram-negative bacteria E.coli and P.aeruginosa (PubMed:15723172, PubMed:24723458). Can induce mast cell migration, degranulation and production of cytokines and chemokines (PubMed:21214543). Acts as a potent scavenger of free radicals in vitro (PubMed:24723458). May play a role in the regulation of cardiac function and blood pressure (PubMed:18541522). {ECO:0000269|PubMed:15326220, ECO:0000269|PubMed:15723172, ECO:0000269|PubMed:21214543, ECO:0000269|PubMed:24723458, ECO:0000303|PubMed:18541522}. [Serpinin]: Regulates granule biogenesis in endocrine cells by up-regulating the transcription of protease nexin 1 (SERPINE2) via a cAMP-PKA-SP1 pathway. This leads to inhibition of granule protein degradation in the Golgi complex which in turn promotes granule formation. .