GAPDH and graft versus host disease: The messenger ribonucleic acid (mRNA) expression of other glycolytic enzymes and transporters, such as glyceraldehyde 3-phosphate dehydrogenase (Gapdh), lactate dehydrogenase (Ldh)-a, monocarboxylate transporter (Mtc4) and phosphoglycerate kinase (Pgk1) have also been found to be elevated in alloreactive T cells in GvHD [19,53].