1. Define: a. chromophore cyanobacterium, Spirulina, contains the chromoprotein,
ID: 590080 • Letter: 1
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1. Define: a. chromophore cyanobacterium, Spirulina, contains the chromoprotein, phycocyanin. What is the name given to the chromophore in phycocyanin? 3. a. In the chromoprotein, phycocyanin, the chromophore is covalently bonded to the protein portion of the structure through the sulfur atom in the side chain of what amino acid? b. Write a structure for this amino acid: c. What noncovalent interaction holds the phycocyanin chromophore in a linear conformation? 4. a. What is the color of phycocyanin when it is properly folded? b. What color does the phycocyanin emit (fluoresce) when it is properly folded? 5. List three types of protein denaturants. a. b. C.Explanation / Answer
1. A chromophore is an atom or group that is responsible for the colour of a compound. For example, B-carotene is a strongly colored orange-red pigment found in yellow and orange fruits, such as carrots, pumpkins, and yarns.
b) A chromoprotein is a conjugated protein that contains a pigmented prosthetic group(or cofactor). A common example is hemoglobin, which contains heme cofactor, which is iron containing molecule that makes oxygenated blood appear red.
2. Phycocyanobilin is the chromophore of phycocyanin.
3. alpha-phycocyanin lyase
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