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A42 with its Tyr-10 substituted by phenylalanine would keep the aromatic nature of the side chain at residue 10 of A but lack the OH group of Tyr that was purported by others to be the source of the free radical of A42

Your doctor may recommend copper supplements if a confirmed deficiency has affected your blood cells and energy production

doi: 10.1073/pnas.1507228112 157 NicklinPBergmanPZhangBTriantafellowEWangHNyfelerBet al

Make sure to provide a list of all prescription medications and over-the-counter drugs or supplements you currently take