STUDIES ON THE COMPLEMENT FIXATION ANTIGENS OF INFLUENZA VIRUSES TYPES A AND B.

Two types of specific particles can be obtained from allantoic fluid preparations of influenza A and B virus. The larger particle which possesses all the attributes of the virus and which shows a sedimentation constant of about 600 S was compared with the smaller component (30 S) by complement fixation technic. The 30 S component can be differentiated from the 600 S particle by the patterns of the optimal antigen-antibody relationships and by cross-absorption of the sera with the two particles.

STUDIES ON THE ANTIGENIC STRUCTURE OF SOME MAMMALIAN SPERMATOZOA.

1. A method has been described for separation of heads and tails of mammalian spermatozoa. 2.