Based on ELISA, the G94-56 antibody reacts specifically with Armenian and Syrian hamster IgG1 monoclonal antibodies, but has low reactivity with some other hamster IgG groups. (Please refer to the Reactivity of Mouse Anti-Hamster Ig mAbs chart on our website for more information: http://www.bdbiosciences.com/pharmingen/hamster_chart_11x17.pdf.) The G94-56 mAb does not react with hamster IgM.