May bind androgens and other steroids, may also bind estramustine, a chemotherapeutic agent used for prostate cancer. May be under transcriptional regulation of steroid hormones. Heterodimer of a lipophilin A and a lipophilin C (mammaglobin B) monomer associated head to head. Expressed in lachrymal gland, thymus, kidney, testis, ovary and salivary gland. Belongs to the secretoglobin family. Lipophilin subfamily.