Chapter 7, Problem 5Q

Summary Introduction

To write:

The proce β taking place at the two checkpoints in the early development of α : β T cells in the thymus.

Introduction:

T lymphocyte or T-cell is (white blood cell subtype) a form of lymphocyte which does a central part in (cell-mediated) immunity. Due to the existence of T-cell receptor on the surface of cell these cells can be differentiated from other lymphocytes like natural killer cells and B cells. Most ofthe T cellsin human, called asa β T cells(alpha betaT-cells), reorganize their a β chains on the receptor of celland comprises the adaptive immune system.