antibody content ( expressed as mg/ml serum ) and apparent binding constants for the n-succinyl derivatives in individual bleedings of immune sera were 1.9 and 1 x 10 ( 10 ) m-1 for phosphotyrosine , 0.825 and 6 x 10 ( 8 ) m-1 for phosphothreonine , and 0.150 and 2 x 10 ( 8 ) m-1 for phosphoserine .
C0003241
antibody
C0020960
immune sera