Table 1.

Characterization of Inhibitor IgG

Name Inhibitor Neutralization by fVIII Domains (%) Immunoprecipitation of fVIII Domains (IP units/mL)
A2 C2 LCh A1 A2B LCh C2 C2-150
MU  ≤5  15  94  0  12 0  480,000  187,700  19.7  
RI  ≤5  26  70 0  781  0  7,755  4,937  5.4  
MS  27  30 78  0  204  0.2  18,890  1,667  5.1 
Name Inhibitor Neutralization by fVIII Domains (%) Immunoprecipitation of fVIII Domains (IP units/mL)
A2 C2 LCh A1 A2B LCh C2 C2-150
MU  ≤5  15  94  0  12 0  480,000  187,700  19.7  
RI  ≤5  26  70 0  781  0  7,755  4,937  5.4  
MS  27  30 78  0  204  0.2  18,890  1,667  5.1 

The inhibitor neutralization results were previously reported15 and are expressed as percent of a control without inhibitor. The calculation of IP units/mL is described in Materials and Methods.

F0-150

IP titers of IgGs after removal of anti-C2 antibodies.

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