In sickle cell anemia, a hereditary disease, there is substitution of one amino acid by other in one of the four-polypeptide chains of hemoglobin. In this case, are all of the structural levels of the protein modified?

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what is the chemical composition of auxin b?

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Many genes are regulated in both a negative and a positive manner. The genes mediating lactose metabolism in bacteria are a classical example. What are the two small molecule ligands that control expression of these genes? What does each one do?

1 Answers   Pace Pharmaceuticals,

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When a forensics laboratory tests evidence collected at the scene of a crime using the "DNA Fingerprinting" technique, what are the technicians comparing?

1 Answers  

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what are the essential aminoacids?

4 Answers   Nutrition Research Laboratories,

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Why does physical exertion increase symptoms of poisoning by trematol?

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What are nucleic acids? What is the historic origin of this name?

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What is the name for magnesium per chlorate and what is its formula?

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Does dna replication occur in cell division?

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what is the emperical formula of vitamin b12?

2 Answers   IDPL,

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what is acidosis and alkalosis in terms of PH?

2 Answers  

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How is the cooling of organs and tissues for medical transplantations associated with the effect of temperature upon enzymatic reactions?

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