Leukocyte common antigen is:: (A) CD 45, (B) CD 20, (C) CD 19, (D) CD 41
Answer is A. Ans. (a) CD 45(Ref: Robbins 9th/pg 590; 8th/pg 600; Wintrobe's 12th/pg 2522)CD 45Found in all hematopoietic cells except erythrocytes.CD45 plays an essential role in lymphocyte activation.Peripheral blood naive T cells are CD45RA, whereas memory (activated) T cells are CD45RO+