2.3.2.13 protein-glutamine gamma-glutamyltransferase hematopoietic system TGase is one of the most abundant proteins in hematopoietic tissue. mRNA expression and enzyme activity are high in hematopoietic cells, less in the semi-granular hemocyte and very low in the granular cells 702896 2.7.1.40 pyruvate kinase hematopoietic system R-type isozyme 641555 2.7.6.1 ribose-phosphate diphosphokinase hematopoietic system high expression level in caudal hematopoietic tissue 762414