| The results of our studies showed that in T cells , CD 45 AP is part of a multimolecular complex that includes not only CD 45 , but also TCR , the CD 4 and CD 8 coreceptors , and p 56 ( lck ) . ^^^ The association of CD 45 AP with TCR , CD 4 , and CD 8 seemed to occur via the shared ability of these molecules to bind CD 45 . ^^^ |