Protein disulfide isomerase family proteins play important roles in the fold-ing of nascent polypeptides and the formation of disulfide bonds in the endoplasmic reticulum. In this study, we cloned two similar protein disul-fide isomerase family genes from soybean leaf (Glycine maxL. Merrill. cv Jack). The cDNAs encode proteins of 525 and 551 amino acids, named GmPDIL-1 and GmPDIL-2, respectively.