An octapeptide with the amino acids < Ile, Arg, Met, Phe,
Pro, Thr, Tyr, Val > was subjected to digestion reactions A, B
and C in order to deduce its amino acid sequence. The following
results were obtained. The exact position occupied by each of the
amino acids (positions 1-8 in the sequence) will be known when the
results are analyzed
A. Digestion with Trypsin yielded a [Thr-Arg] dipeptide and
a [hexapeptide] with the remaining amino acids.
Question (A1): Explain...
The amino acid sequence of human adrenocorticotropin, a
polypeptide hormone, is:
Ser-Tyr-Ser-Met-Glu-His-Glu-Arg-Trp-Gly-Lys-Pro-Val-Gly-Lys-Lys-Arg-Arg-Pro-Val-Lys-Val-Tyr-Pro-Asp-Ala-Gly-Glu-Asp-Gln-Ser-Ala-Glu-Ala-Glu-Pro-Leu-Glu-Phe
a)What is the approximate net charge of this molecule at pH 3? ph
7? ph 9? Assume that the pKs of the terminal -NH3+ and -COOH groups
are 7.8 and 3.6, respectively.
QUESTION 6 Which of the following peptides is most likely an
alpha helix?
Arg-Ala-Tyr-Pro-Met-Gly-Val-Leu-Ser-Asp
Glu-Ala-Tyr-Pro-Met-Gly-Val-Leu-Ser-Lys
Glu-Ala-Tyr-Phe-Met-Gln-Val-Leu-Ser-Lys
Arg-Ala-Tyr-Phe-Met-Gln-Val-Leu-Ser-Asp
Propose a simple method for separating a mixture of a solid
consisting of Al(OH)3 and Fe(OH)3. Draw a flowchart for the
separation. Include the relevant confirmation tests for each
ion
Water is cooled to 32K, and it appears to be on the solid phase
on the phase changing diagram as the temperature is low. We
compress the ice to a temperature of 340-350K (around 30ATM on the
pressure dial).a. Where is the red dot now located in the phase changing
diagram? Would it be on the line between liquid and gas phases?b. What does that position on them phase change diagram say
about pressure and temperature?c. What happens to the...
Water changes between solid phase (as ice) and liquid phase at 0℃. and between liquid phase and gas phase (as water vapor) at 100 ℃. Write a program to accept a temperature front keyboard, and display the corresponding water phase (solid, liquid or gas) under that temperature.
The activity of a free ion may be controlled by equilibrium with
a solid phase that contains that ion. The activity of Al3+(aq) in
equilibrium with gibbsite at pH 4 is 10-5.5. Calculate the change
in concentration of Al3+(aq) if the ionic strength of the
background solution (dominated by NaCl) shifts from 6 mM (6 x 10-3
M) to 60 mM (60 x 10-3 M).
In the video, you can see that when heat is applied to a solid it is converted into the liquid phase and then into the gas phase. This process can be studied by plotting the graph of temperature versus the time during which heat is applied to the system. Using this information, arrange the average kinetic energy of the molecules for the following options in decreasing order. Rank from the highest to lowest. To rank items as a equivalent, overlap them.