Provided is an enzymatic process for preparing mercaptans from disulfides.

Provided is an enzymatic process for preparing mercaptans from disulfides.

Provided is an enzymatic process for preparing mercaptans from disulfides.

This invention relates to the identification of peptide binding to ligands, and in particular to identification of epitopes expressed by microorganisms and by mammalian cells. The present invention provides polypeptides comprising the epitopes, and vaccines, antibodies and diagnostic products that utilize or are developed using the epitopes.