Percentage total lymphocytes formed by null cells:

(Refer: Anantha Narayanan and Paniker’s Textbook of Microbiology, 9th edition, pg no: 137) Null cells 5 % of lymphocyte lack phenotypic markers of B or T lymphocytes MHC unrestricted & Non adherent Also called as Large Granular Lymphocyte Expresses NCAM – I – CD 56 & Fc portion of Ig G – CD 16 Arise in both bone marrow & thymic environment Components of Null cells K cell or ADCC lymphocyte NK cell – LAK cell (IL – 2) & NK/T cell (CD – 3) Functions of Null cells