Roche Diagnostic Systems, Inc.

Hoffmann-la Roche Inc.

Stuart Le Grice

Wilhelm Bannwarth

Jan Mous

Patrick Caspers

Hermann Bujard

Polypeptides which include at least one antigenic and/or immunogenic determinant of the envelope protein (env) of the HIV-2 virus and their production by recombinant DNA technology and the DNA sequences, expression vectors and transformed single-cell organisms used in this process are provided. A method for the detection of HIV antibodies or HIV viruses in human sera or in other biological fluids is also provided.

HIV-2 envelope polypeptides

New gram-positive expression control DNA sequences useful in the expression of pro- or eukaryotic proteins in gram-positive organisms are provided having in the downstream direction of transcription a transcription initiation DNA sequence of gram-negative origin combined with a ribosome binding site-encoding DNA sequence, optionally a foreign gene and a transcription termination sequence. Also described are expression vectors containing these expression control DNA sequences and processes using same for the manufacture of pro- and eukaryotic polypeptides. In addition processes for the manufacture of such gram-positive expression control DNA sequences and such expression vectors are described.

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Basel, Switzerland

Stuart Le Grice