Purity ~90% (SDS-PAGE). Ketosamine-3-kinase, also known as FN3KRP, catalyzes the phosphorylation of psicosamines and ribulosamines compared to the neighboring gene which encodes a highly similar enzyme, fructosamine-3-kinase, which has different substrate specificity. The activity of both enzymes may result in deglycation of proteins to restore their function. Source: Recombinant protein corresponding to aa1-309 of human FN3KRP, fused to His-tag at N-terminal expressed in E. coli. Molecular Weight: ~36.8kD AA