Recombinant Biotinylated Human Fc gamma RIIIB/CD16b (NA2) Protein is expressed from Expi293 with His tag and Avi tag at the C-terminal.,It contains Gly17-Ser200. The CD16b NA1 differ with the CD16b NA2 in AA36, 65, 82, and 106. The CD16b NA1form carries