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Question: A 14-residue peptide, TRWVKVNGKWIKQA, in the context of a protein forms a ?-hairpin, consisting of two anti-parallel ?-strands connected by a turn. You have found that the amide nitrogen of arginine forms a hydrogen bond with the carbonyl oxygen of glutamine. Based on your finding, characterize the structure of the hairpin as follows:
(a) Draw schematically all the hydrogen bonds between the backbone atoms for this hairpin. Do not draw the side chains - just indicate what residues are connected by H-bonds. How many hydrogen bonds between the backbone atoms are present in the structure?(b) What residues are involved in the ? -turn?
About how long is a DN A double helix that is made up of 900 base pairs? Suppose that genes A, B, C, and D are located on the same chromosome.
At the startingof the spring, Dr. Peter Erlenmeyer notices that there is an equal distribution of long and short stemmed dandelions in the vacant lot across the street from his house as well as in his own backward and Explain how the information stor..
Anatomical attributes that are reduced and functionless in organisms but related to functional organs in related organisms are termed. Vestigial. Homologous.
Compare and contrast the structure and function of the circulatory systems in insects and in mammals. Explain why each animal's system works for that animal. Don't ignore gas exchange; it's connected with circulation.
From a bacteria stock you serially dilute 1/100 two times, then serially dilute 1/10 two times. From this last tube you plate 100 ul, which produces 156 colonies the other day.
Excessive alcohol consumption with increase the ratio of NADH/NAD+. This will directly inhibit which enzyme in the TCA cycle, A three year-old male presents to the emergency room with hypoglycemia
Normal cells greatly slow their rates of cell division after filling culture dish with layer that is one cell deep. If a circular group of cells is removed from the middle of the filled culture dish.
When an experiment is repeated with a protein medium, yeasts grow only in the presence of oxygen. Pasteur concluded that the yeasts can take oxygen from air, and in the absence of air, the yeasts take oxygen from sugar.
An electric field with a magnitude of 170 N/C exists at a spot that is 0.11 m away from a charge. At a place that is 0.36 m away from this charge, what is electric field strength.
Determine the sequence of genes along a chromosome based on the following recombination frequencies: A-B = 8 cM; A-C = 28 cM; A-D = 25 cM; B-C = 20cM; B-D = 33 cM
In the harlequin-chromosome technique, you allow THREE rounds of replication in bromodeoxyuridine and then stain the chromosomes. What result do you expect to obtain.
Suppose that you have 1M stock solutions of NaCl, KCl, and CaCl2. If the ion concentrations in human plasma are 120 mM Na+, 12mM K+, and 2 mM Ca+.
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