Nomes e Estruturas de Aminoácidos

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Solutions to Problems 489 Solutions to Problems 30. COOH COOH H₂N H H₂N H H H OH CH₂CH₃ CH₃ L-Isoleucine L-Threonine Systematic name for L-threonine: (2S, acid. 31. COOH H₂N CH₃ CH₂CH₃ Allo-L-isoleucine Systematic name for allo-L-isoleucine: (2S, 3R)-2-amino-3-methylpentanoic acid. 32. Structures are presented in order of increasing pH (in parentheses). COOH + + (a) H (1) H (7) (12) CH₃ CH₃ CH₃ COOH + + (b) H (7) H (12) CH₂OH CH₂OH CH₂OH COOH (c) (1) (7) (9.5) H (12) + (CH₂)₄-NH₃ (CH₂)₄-NH₂ COOH COO + + + (d) H3N H H (1) H H (5) H3N H H (7) H (12) N N N N CH₂ CH₂ CH₂ CH₂ NH NH N N + COOH COO + + (e) H3N H (1) H3N H (7) H3N H (9) H (12) CH₂S⁻ CH₂S COOH COO + + (f) H (1) H (3) H3N H (7) H (12) CH₂COO