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a. Write out the reaction equilibria for the sequential deprotonation of tyrosine and the equations for the corresponding Ka for each. (Hint: There should be three reaction equilibria.) You may abbreviate tyrosine as Tyr and indicate the appropriate number of hydrogens and charge (i.e., H3Tyr+ for fully protonated tyrosine). Also make sure you differentiate between the different Kas (Ka', Ka", etc). b. Draw out the full structures of tyrosine and indicate the order in which the hydrogens come off. c. On one graph, plot the fractional composition of each protonated/deprotonated form of tyrosine in aqueous solution as a function of pH. Note that the conjugated pairs are at equal concentration when the pH is equal to the pKa of the acid member of the pair. (See Table 8.6 of your book for pKa values.) Indicate pI on the graph d. What equation relates the pI of tyrosine to its pKas? e. Clearly indicate the pI on your graph in question 4b).
In the absence of the protein translating catalysts of the cell, what would be required to form a peptide bond between two adjacent amino acids such as that found in a proteins primary structure?
Identify the genetic term that best describes the inheritance of this form of elevated cholesterol level.
How can you find the actual duration from the relative duration? Say the relative duration was 44% and you had to find the actual duration in minutes.
For which case do you expect a stable polymorphism at equilibrium?
Assume you have isolated a cell population from bone marrow using as newly discovered CD antigen. You believe that this population has hematopoietic potential.
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Determine what types of channels contribute the mose to the resting potential of neuron and where would you expect the resting membrane potential to be and why.
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Determine the independent variable in the corn experiment? What was the dependent variable in the corn experiment?
Ribosomes found in bacterial cells consist of two subunits, a small subunit and a large subunit. S stands for Svedberg units, which indicated relative sedimentation rate in centrifuge for a particle of a given size and shape.
In a separate experiment CC dd individuals were crossed to cc DD individuals. The F1 generation was then testcrossed to cc dd individuals. What would be the result of this testcross.
Discussion what types of diseases can occur when there are errors in meiosis? Why do these diseases occur?
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