Anti-CTLA4, AlpHcAbs Human antibody is designed for detecting human CTLA4 specifically. Anti-CTLA4, AlpHcAbs Human antibody is recombinant VHH domain of alpaca IgG2b/2c fused to Human IgG1 Fc. Based on ELISA, Anti-CTLA4, AlpHcAbs Human antibody reacts with human CTLA4, and has reactivity with cynomolgus or alpaca CTLA4.