Exam 1-2004 - BIO 361 EXAM 1 FALL 2004 NAME:_ ID:_ 1. Write...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
BIO 361 EXAM 1 FALL 2004 NAME:_________________________________________________ ID:_____________________________________________________ 1. Write Your name and ID on all pages 2. Write all answers in pen only 3. Try to limit your answers to the space provided 4. Make sure your exam has six pages including this cover page Page 2 _______________ Page 3 _______________ Page 4 _______________ Page 5 _______________ Page 6 _______________ Total _______________ Maximum of 110 points
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
2 1. Shown below is a modified tripeptide, which resembles the chromophore of red fluorescent protein. The backbone looks unusual because of a cyclization reaction, which is accompanied by a dehydration reaction. (a) Identify (by circling all available atoms) and name the three residues that make up the chromophore. (b) What is the overall charge of this peptide at pH 2 and pH 12? (c) Calculate the pI of this tripeptide. For (c) show how you derived your answer. (12 points) 2. The sequence Leu-Ile-Thr-Thr-Ala-His-Ala has been found to adopt an α -helix in one protein and a β -strand in another. (a) Approximately how far apart will be the first and last residue in both conformations? Show how you derived your answer. (b) Label each residue either with α or β according to its secondary structure preference. (10 points) COO - N O N NH 3 + H 2 N HO O
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 6

Exam 1-2004 - BIO 361 EXAM 1 FALL 2004 NAME:_ ID:_ 1. Write...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online