has plasma membrane part output of has high plasma membrane amount has low plasma membrane amount naive T cell naive T lymphocyte naive T-lymphocyte Mature T cell not yet exposed to antigen with the phenotype CCR7-positive, CD45RA-positive, and CD127-positive. This cell type is also described as being CD25-negative, CD62L-high and CD44-low. naive T-cell mature T cell T cell selection receptor-type tyrosine-protein phosphatase C isoform CD45RA C-C chemokine receptor type 7 CD44 molecule L-selectin interleukin-7 receptor subunit alpha