systemic administration of 8-methoxypsoralen ( 0.5 , 1 , 2.5 , or 5 mg/kg ) through i.p . injection , followed by activation with topical near-ultraviolet light ( 3.75 x 10 ( 4 ) ergs/sq mm at 365 nm ) resulted in an increase in sister chromatid exchange , reaching 15.4/cell at 5 mg 8-methoxypsoralen per kg .
C0037211
sister chromatid exchange
C0007634
cell