Recombinant Rat CD81/TAPA-1 Protein

Tapa1

A DNA sequence encoding the rat Cd81 (NP_037219.1) (Lys116-Lys201) was expressed with two additional amino acids (Gly & Pro) at the N-terminus.

NP_037219.1

> 85 % as determined by SDS-PAGE

Lyophilized proteins are stable for up to 12 months when stored at -20 to -80CC. Reconstituted protein solution can be stored at 4-8C for 2-7 days. Aliquots of reconstituted samples are stable at < -20C for 3 months.

Lyophilized from sterile PBS, pH 7.4

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.