Assertion: methionine | /r/CapableOf | exist as scheme
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Source sentences:
text: Methionine exists as cathionic species R+ in solutions of pH less than 7, scheme 1, the cationic species of methionine can be adsorbed on previously adsorbed anions (chlorides and sulphate ions), since organic compounds are known to be adsorbed on the metal surface even at high concentration of anions .