native vitamin a metabolites ( ra , 13-cis-ra ) and the structure-like substances ( c15-c20-retinoids and others ) at 10 ( -6 ) = 10 ( -7 ) m concentrations increased 2-2.5-fold the formation of t killers in vitro after stimulation of the lymphocytes by suboptimal doses of allogenic x-ray irradiated cells , the lymphocyte proliferation was inhibited in the mixed culture at 10 ( -5 ) m and higher concentrations of the substances .
C0042839
vitamin a
C0040845
ra