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Lack of effect of anti-CD4bs mAbs b12 and F105 on neutralization of JRFL by mAb 447-52D and GP vaccine serum 82-4. Unlike sCD4, which increases neutralization sensitivity of JRFL to anti-V3 antibodies, b12 and F105 did not affect neutralization sensitivity of JRFL to anti-V3 antibodies. The IC50 and IC80 of sCD4, b12 and F105 against JRFL are indicated on the X-axes.
