Summary: Cat.No. : PTS-498H Product Overview : Recombinant Human Pts mature form (Q03393) (Met1-Glu145), fused with a polyhistide tag at the N-terminus, was produced in E. coli. Source : E. coli Species : Human Tag : His Predicted N Terminal : His Form : Lyophilized from sterile PBS, 40% Glycerol, pH, 7.4.Normally 5 % - 8 % trehalose and mannitol are added as protectants before lyophilization.