May inhibit cardiomyocyte growth. Interacts with PSP94/MSMB. Expressed in prostate, testis, ovary and intestine. Concentrates in prostate cancer patient's sera. N- and O-glycosylated. O-glycosylated with core 1 or possibly core 8 glycans. May serve as a marker following prostatectomy for prostate cancer. Belongs to the CRISP family.