S(CH2-CH(NH3)_-COO- )2; 3,3'-thiodialanine;an amino acid obtained from wood which resembles cystine but has only one sulfur atom in the molecule rather than two; i.e., a sulfide rather than a disulfide.
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... in living organisms. Microorganisms and plants can produce uncommon amino acids. In microbes, examples include 2-aminoisobutyric acid and lanthionine, which is a sulfide-bridged alanine dimer. Moreover In humans, non-protein amino acids also have biologically-important roles. Glycine, ...
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