F08-BCH361-homework_2 - disulfide bond? (6) Which amino...

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Homework 2 BCH 361 Fall 08 Name of the student: Student ID: (1) Give the structure formula and name of two aromatic amino acids! (2) Identify the non-polar ( ), polar ( ), negatively charged (- ) and positiveley charged (+) amino acids (at pH 7) in the following amino acid sequence. Ile-Ala-Gly-His-Pro-Gly-Ser-Met-Trp-Glu-Gln-Asn-Ala-Phe (3) Draw the amino acid alanine in its zwitterionic form. (4) Give the main structural features of alpha-helices and beta-sheets. (5) What is a di-sulfide bond? Which amino acids is involved in the formation of
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Unformatted text preview: disulfide bond? (6) Which amino acids are found in silk? (7) Which two amino acids are found most frequently in turns, connecting β-sheets? (8) Draw a schematic picture of a beta-meander! (9) Indicate if the following proteins consist mainly of beta-sheets or alpha-helics: Myoglobin Silk Collagen (10) Explain the main principle of X-ray structure analysis . (11) What is the main advantage of NMR-spectroscopy compared to X-ray structure analysis? What are the limitations of structure analysis by NMR?...
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This note was uploaded on 09/30/2011 for the course BCH 361 taught by Professor Fromme during the Fall '08 term at ASU.

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F08-BCH361-homework_2 - disulfide bond? (6) Which amino...

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