This antibody specifically reacts with a protein of 20-30kDa, identified as PGP9.5, also known as ubiquitin carboxyl-terminal hydrolase-1 (UchL1). Initially, expression in normal tissues was reported in neurons and neuroendocrine cells but later it was found in distal renal tubular epithelium, spermatogonia, Leydig cells, oocytes, melanocytes, prostatic secretory epithelium, ejaculatory duct cells, epididymis, mammary epithelial cells, Merkel cells, and dermal fibroblasts. PGP9.5 antibody has been used to show the protein to be a useful prognostic indicator of colorectal, pancreatic and gall bladder cancer. A mutation in the gene is believed to cause a form of Parkinson's disease.

Store the PGP9.5 antibody at 2-8°C (with azide) or aliquot and store at -20°C or colder (without azide).