has role protective antigen role protective antigen Cryptosporidium parvum protein Cp23 from Crptosporidium parvum Protegen ID: 776; NCBI Protein GI: 88659549; NCBITaxon: 5807 In this study, Cp23 antigen was investigated as a vaccine candidate using the DNA vaccine model in adult interleukin-12 (IL-12) knockout (KO) mice, which are susceptible to C. parvum infection. Cp23-DNA vaccination induced a 50-60% reduction in oocysts shedding, indicating a partial protection against C. parvum infection in IL-12 KO mice [PubMed: 17487508]. Oliver He protein Anthony Huffman A Cp23 protein that is part of Crptosporidium parvum Allen Xiang