has role protective antigen role protective antigen Giardia duodenalis protein CWP2 The gene encoding the full length cyst wall protein-2 (CWP2) from Giardia lamblia was subcloned into the pCDNA3 mammalian expression vector and stably introduced into S. typhimurium STM1. Challenge infection with live Giardia muris cysts revealed that mice receiving the CWP2-encoding DNA vaccine were able to reduce cyst shedding by approximately 60% compared to control mice [PubMed: 17996337]. Oliver He protein Protegen ID: 479; NCBI Gene GI: 5703171; NCBI Protein GI: 159120052; NCBI Protein Accession: XP_001710242; NCBITaxon: 50803 Allen Xiang