Chiron Corporation

Gary A Van Nest

Gary S Ott

Paul A Luciw

Deborah Lynn Parkes

Gail L Barchfeld

A vaccine composition, comprising an antigenic substance in association with a liposome and an oil-in-water emulsion comprising a muramyl peptide, a metabolizable oil, and optionally an additional emulsifying agent. The two components of the adjuvant (i.e., the liposome/antigen component and the emulsion component) act together to produce high levels of immune response.

Vaccine compositions containing liposomes

Methods and compositions are provided for the efficient production of a polypeptide having immunological reactivity corresponding to that of naturally-occurring envelope glycoproteins of feline leukemia virus. A DNA construct including a replication system recognized by yeast, and a viral envelope protein gene under the transcriptional control of a yeast promoter, and terminator is provided. By transforming a yeast host with the DNA construct, enhanced yields of the product may be obtained. Saccharomyces carlsbergensis strains 2150-2-3 (pCP-envB-R) and 2150-2-3 (pCP-envA-R) were deposited at the American Type Culture Collection on July 18, 1984, and granted accession nos. 20720 and 20721, respectively.

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El Sobrante, CA, United States of America

Gary A Van Nest