B (B/Florida/4/2006) Nucleoprotein/NP Protein (His Tag) (recombinant influenza)

Protein Construction: A DNA sequence encoding the Influenza B (B/Florida/4/2006) nucleoprotein (ACF54251.1) (Met1-Tyr560) was expressed with a polyhistidine tag at the C-terminus. Sequence: Met1-Tyr560. Fusion tag: C-His Endotoxin: < 1.0 EU per µg of the protein as determined by the LAL method. Protein function: CD81, also known as TAPA-1, belongs to the transmembrane 4 superfamily, also known as the tetraspanin family. Members of this family mediate signal transduction events that play a role in the regulation of cell development, activation, growth and motility.CD81 is a widely expressed cell-surface protein involved in an astonishing variety of biologic responses. It is related to adhesion, morphology, activation, proliferation, and differentiation of B, T, and other cells. On B cells CD81 is part of a complex with CD21, CD19, and Leu13. This complex reduces the threshold for B cell activation via the B cell receptor by bridging Ag specific recognition and CD21-mediated complement recognition.