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Sex differences in serum amino acid levels 3 d after a 4 Gy γ-ray TBI in NHPs. While levels increased for both males and females after exposure, higher fold changes were observed in phenylalanine, threonine, serine, and valine in females. (* P < 0.05 determined by a t-test, mean ± SEM., pre-exposure samples [-8 and -3 d] were averaged for the control group).
