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Altering the amino acids at position 10 & 11 to be Tyr and Phe results in a purple protein.
Experiment:
We constructed a protein that was identical in sequence to the other color proteins except that the amino acids at positions 10 and 11 were Tyr and Phe.
Result:
The protein that resulted was purple.
Conclusion:
The data supports the hypothesis, with a purple protein resulting from the modification that was made.
Hypothesis: In the protein sequence, if a Phenylalanine and a Tyrosine are placed next to each other in the 10th and 11th positions, the resulting flower coloration will be purple.
Experiment: We constructed a protein consisting of a group of 6 hydrophobic amino acids in the center and two groups of hydrophilic amino acids on either end. Under 6 hydrophobic and the color disappeared. Over 6 and the color returned.
Result: When there were 6 or more hydrophobic amino acids, color appeared. This was also true for the number of hydrophilic amino acids. When there were less than 6 of either, the color disappeared.
Conclusion: Our hypothesis is accurate.
Hypothesis: Our hypothesis is that the color of a functional protein can be effected by changes in the specific sequence of amino acids. Replacing a particular amino acid with a similar amino acid should change the color of the protein.
Experiment: We began by creating a yellow protein.
We then experimented by replacing #10 tryptophan with tyrosine and phenylalanine to see if there was a change in color.
Results:
Replacing tryptophan with tyrosine changed the color of the protein from yellow to blue without changing the structure of the protein.
Replacing tryptophan with phenylalanine changed the color of the molecule from yellow to red without changing the color.
Conclusion: The color of a protein can be changed by replacing one amino acid with another.
Hypothesis:
We believe that if we take one amino acid from the red protein and one amino acid from the blue protein we can make a purple protein
Experiment:
We interchanged the two amino acids that we took from the red and blue proteins and placed them in the 10th and 11th positions of the chemical sequence.
The Result:
We put tyrosine in the 10th position and phenylalanine in the 11th position.
The Conclusion:
In making the changes to the 10th and 11th positions in the chemical sequence we resulted in a purple protein.
HYPOTHESIS: If we combine the colors red and blue, then the results would make a purple protein.
EXPERIMENT: In our experiment, there were two hydrophilic amino acids and three hydrophobic amino acids and ten intermediate amino acids. In order to make the protein purple, we added amino acids Tyr and Phe in positions 10 and 11, respectively. We noticed that the combination of Tyr and Phe was what made the protein purple.
RESULTS: When a hydrophobic amino acid (Phe) was added, we noticed a color change in the protein sequence, which is purple.
CONCLUSION: Our hypothesis was accurate.
Hypothesis: To create a true-breeding purple flower, you must look at the difference between a red true-breeding flower and a blue true-breeding flower and combine these differences into one flower.
Experiment: We examined the red true-breeding flower and the blue true-breeding flower and found that the difference was in amino acid #9: red had Phe at position #9 and blue had Tyr. There were no other differences in the sequence. We took this exact sequence and at position #9 added both Phe and Tyr and constructed a true-breeding purple flower.
Result: The amino acid sequence with both Phe and Tyr at positions #9 and #10 results in a purple flower.
Conclusion: Our hypothesis is accurate.
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