we present here evidence that an antiserum to a peptide from the pres1 sequence , anti-pres ( 21-47 ) , is virus-neutralizing and that active immunization of chimpanzees with a longer peptide derived from the pres1 sequence , pres ( 12-47 ) , elicits antibodies protective against hbv infection .
C0020960
antiserum
C0003241
antibodies