Native Human complement C4 was purified from Human serum.
10 mM sodium phosphate, 145 mM NaCl, pH 7.3
>80% versus normal human serum standard
205,000 Da (3 chains)
Normal human serum (shown by certified tests to be negative for HBsAg, HTLV-I/II, STS, and for antibodies to HCV, HIV-1 and HIV-II). Use normal precautions for handling human blood products.
store at -70 centigrade or below. Avoid freeze/thaw.
None, 0.22 µm filtered.