Erb-b2 receptor tyrosine kinase 2 is a member of EGFR family. Erb-b2 receptor tyrosine kinase 2 is over-expressed in the tumors of many types of cancers. Erb-b2 receptor tyrosine kinase 2 enables ATP binding and transmembrane receptor protein tyrosine kinase activity. HER2/CD340 Protein, Cynomolgus (Biotinylated, HEK293, His-Avi) is the recombinant cynomolgus-derived HER2/CD340 protein, expressed by HEK293 , with C-Avi, C-His labeled tag. The total length of HER2/CD340 Protein, Cynomolgus (Biotinylated, HEK293, His-Avi) is 630 a.a., with molecular weight of 90-105 kDa.