Abstract
The effects of 10 amino acids on sister-chromatid exchange (SCE) frequency in human peripheral blood lymphocytes (PBL) and six amino acids on the SCE frquency in root tip cells of Hordeum vulgare were studied. Alanine (Ala), glycine (Gly), phenylalanine (Phe), valine (Val), histidine (His) and serine (Ser) induced a significant increase in SCE in PBL but threonine (Thr), isoleucine (Ile), lysine (Lys) and arginine (Arg) did not. Ala, Gly, Thr, Ile and Val induced a significant increase in SCE in root tip cells of Hordeum vulgare but Lys did not. The effect of Lys and bromodeoxyuridine (BrdU) on SCE levels in PBL and the interaction between them were also studied. The results show that Lys can inhibit the SCE induced by BrdU.
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