Human PFKFB4 protein, also known as recombinant 6- phosphofructo-2-kinase/fructose-2,6- bisphosphatase 4, 6PF-2-K/Fru-2,6-P2ase 4, and PFK/FBpase 4, a.a. 2-469 with an N-terminal His-tag, GenBank Accession No. NM_004567/NM_004558, MW = 55 kDa, expressed in an E. coli cell expression system.