Part of a large chaperone multiprotein complex comprising CABP1, DNAJB11, HSP90B1, HSPA5, HYOU, PDIA2, PDIA4, PPIB, SDF2L1, UGGT1 and very small amounts of ERP29, but not, or at very low levels, CALR nor CANX. Ubiquitously expressed with high expression in testis, moderate expression in the pancreas, spleen, prostate, small intestine and colon. Very low expression is seen in brain and skeletal muscle.