monoclonal antibodies ( mabs ) to 2 epitopes on the haemagglutinin-neuraminidase ( hn ) protein of the ulster strain of newcastle disease virus neutralized synergistically : mabs to hn-1 and hn-2 neutralized 1.2 and 1.7 log10 infectious units ( i.u . ) of virus when single as compared to 4.1 when combined .
C2985502
hn
C0042776
virus