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What is Percentage total lymphocytes formed by null cells: and explain in detail?
(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