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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).
Experiments with erythrocyte "ghosts" were carried out to learn more about the glucose transporter in red blood cells. "Ghosts" are prepared by lysing red blood cells in a hypotonic medium and washing away the cytoplasmic contents.
Purple eye color in fruit flies is an autosomal recessive trait whereas the normal eye color in fruit files (brick color) is an autosomal dominant trait.
Grandma has occasional pain in her chest. When this occurs, she puts a nitroglycerin tablet under her tongue and after awhile, the pain goes away. What condition does grandma suffer from? What causes this pain in her chest? How does the nitroglyce..
Recently, some researchers have discovered that having an extra copy of a certain very small region on the 16th chromosome leads to individuals with extremely low BMI (body mass index). Describe two different structural mutations that could lead t..
How would you compare/contrast a hypothesis and theory as pertaining to science? What examples can you provide to support your answer?
Can you imagine any potential advantage that would result from the duplication of a region of a chromosome? Briefly explain what/why.
The genotypic frequencies of the MN blood groups in various populations are shown below. Given this information, determine if the genotypic frequenciesd are in general agreement with the Hardy-Weinberg law.
After one minute, ask your subjects to close their eyes. Once their eyes are closed, ask them to recite everything in the room that is different colour than the one they were looking for, for in case, anything and everything that is green.
which phylum (named group at the end of a branch) is the most ancient or basal of all animals?
What is occurring in the digestive system of a person who suffers from constipation?
Identify three features of the digestion of fat that help to explain why Richard doesn't consume fat if an immediate source of energy is required.
What was this experiment and why was it so significant? Diagram and briefly describe the steps of the process. How and why has recombinant DNA technology impacted biotechnology.
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