the expression of the dna base-excision-repair enzyme uracil-dna glycosylase in the human hematopoietic system followed a tightly regulated pattern : high enzyme activities were recorded in proliferating bone marrow progenitor cells and in peripheral blood t- and b-cells , both groups of cells requiring the integrity of their genetic information for their proper function .
C0018957
hematopoietic system
C0229664
peripheral blood