Chromogranin A
（重定向自Pancreastatin）
![](/Images/godic/202502/01/PBB_GE_CHGA_204697_s_at_tn2216.png")
![Micrograph of a paraganglioma stained with chromogranin A immunostain.](/Images/godic/202502/01/Paraganglioma_-_chromo_-_intermed_mag2216.jpg")
Chromogranin A or parathyroid secretory protein 1 (gene name CHGA) is a member of the granin family of neuroendocrine secretory proteins, i.e., it is located in secretory vesicles of neurons and endocrine cells such as islet beta cell secretory granules in pancreas. In humans, chromogranin A protein is encoded by the CHGA gene.