Armenian hamster mAb (5D3) was produced to peptide EDAGGGGLSKKPATLLLRH GPRGP, representing residues 11–34 on mouse Tapasin (TPN) (44). TPN mAb was found to be specific for mouse TPN, as determined in a Western blot analysis of cell lysates of .221 (human TPN-positive) cells, .220 (human TPN-n…