Steroidogenic acute regulatory protein (STAR), is a rapidly synthesized labile mitochondrial phosphoprotein whose expression, activation and extinction is regulated by protein kinase A (PKA) and PKC, as well as a host of other signaling pathways. STAR is primarily present in steroid-producing cells, including Leydig cells in the testis, theca cells and luteal cells in the ovary and adrenal cells in the adrenal cortex. Low level of STAR expression in other tissues that produce steroid hormones for local use have been reported. STAR is a sensitive and specific marker for Leydig cell tumor. It is useful for differential diagnosis of sex-cord stromal tumor (SCST).
Catalog No. MC0397, MC0397RTU7
Clone
MD81
Isotype
IgG2b/k
Host species
Mouse
Species Reactivity
Human
Cellular Localization
cytoplasm
Positive Control
leydig cell tumor, testis
Applications
IHC
Intended Use
Research Use Only