Alternative titles and symbols : Prolyl 4-hydroxylase, beta subunit; Phdb; Disulfide isomerase; Protein disulfide isomerase/oxidoreductase; Protein disulfide isomerase, family a, member 1; Thyroid hormone-binding protein p55, cellular; Glutathione-insulin transhydrogenase; PROHB; PO4HB; DSI; PDI; PDIA1; GIT;