| thyronine | HOC6H4-O-C6H4-CH2-CHNH2-COOH;an amino acid with a diphenyl ether group in the side chain; occurs in proteins only in the form of iodinated derivatives (iodothyronines), such as thyroxine. (05 Mar 2000) |
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| thyronines | A group of compounds that are derivatives of the amino acid thyronine, which has a diphenyl ether group in the side chain. (12 Dec 1998) |