Formalin-fixed, paraffin-embedded human Testis stained with StAR Mouse Monoclonal Antibody (STAR/2077).
Formalin-fixed, paraffin-embedded human Stomach stained with StAR Mouse Monoclonal Antibody (STAR/2077).
SDS-PAGE Analysis Purified StAR Mouse Monoclonal Antibody (STAR/2077). Confirmation of Integrity and Purity of Antibody.
Known Applications & Suggested Dilutions
Host / Ig Isotype
Mol. Weight of Antigen
Specificity & Comments
Steroidogenic Acute Regulatory Protein (STAR) controls the rate-limiting step of steroidegenesis by translocating cholesterol from the outer mitochondrial membrane to the inner membrane where it is later cleaved to pregnenolone.It 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. Due to low levels of pregnenolone, seminomas and Leydig cell tumors display no specific STAR staining. Therefore, STAR antibody may assist in differentiating sex cord stromal tumors (SCST), seminomas and embryonal carcinomas.