A sensitive colorimetric method for the measurement of serum C1 inactivator using the substrate N-alpha-acetyl-L-lysine methyl ester
Harpel, P.C., 1970: A sensitive colorimetric method for the measurement of serum C1 inactivator using the substrate N-alpha-acetyl-L-lysine methyl ester. Journal of Immunology 104(4): 1024-1030