A - Human Necessities – 61 – K
Patent
A - Human Necessities
61
K
167/130
A61K 39/12 (2006.01) C07K 14/02 (2006.01) A61K 39/00 (2006.01)
Patent
CA 1066191
ABSTRACT OF THE DISCLOSURE Hepatitis B antigen useful as vaccine is prepared from clarified plasma of hepatitis B donors by treating with pepsin at a pH wherein pepsin is enzyma- tically active, treating with urea, and optionally treating with formaldehyde.
251740
Bertland Alexander U. (ii)
Buynak Eugene B.
Lampson George P.
Tytell Alfred A.
Merck And Co.
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