Abstract: Objective To identify novel gene by screening the cDNA library of adult Taenia saginata a siatica(Ta),so as to predict the structure and function of the gene.Methods By on line analysis at bioinformatics websites and employing software package,the physical chemical characteristics,modification sitesafter translation,domains,subcelluar location,to pological structure,second structure,and 3d miension structure of annex in sB3 were predicted.Results Taannexins B 3 possesses a molecular mass of 19211.0,pI 6.44 and the sequence contains 1176bp with coding region from 70 to 588,encoding for 173 amino acid.The amino acid sequence shows 58% identity and 78% positives with that of Taenia solium.The prote in contains notransmem brane region and subcellular location sequence.Conclusion Annex in sB3 gene was screened from the cDNA library of adult Taenia saginata a siatica by bioinformatical method.