incubation of bone marrow and fetal liver early ( bfu-e ) and late ( cfu-e ) erythropoietic progenitor cells , in the presence of gsh , in an atmosphere containing 5 % oxygen , 5 % carbon dioxide and 90 % nitrogen , as opposed to air supplemented with 5 % carbon dioxide , resulted in an increase in colony numbers and response to erythropoietin ( epo ) .
C0005953
bone marrow
C2350175
erythropoietic progenitor cells