Form:Supplied as a lyophilized powder from PBS, pH 7.2, 0.09% sodium azide, 1% BSA. Labeled with R. Phycoerythrin (RPE). Reconstitute with 1ml sterile 40-50% glycerol, ddH2O.
Specificity:Recognizes the human CD28 cell surface antigen, a 44kD glycoprotein expressed by a subset of T lymphocytes. It has been reported that this clone also recognizes an epitope of CD28 expressed by NK cells, which is not recognized by clones of 9.3 or CD28.2(1).