Oxidation of the aromatic amino acids tryptophan and tyrosine disrupts their anabolic effects on bone marrow mesenchymal stem cells - El Refaey, M; Watkins, C P; Kennedy, E J; Chang, A; Zhong, Q; Ding, K H; Shi, X M; Xu, J; Bollag, W B; Hill, W D; Johnson, M; Hunter, M; Hamrick, M W; Isales, C M (Mol Cell Endocrinol, 2015)