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A pentapeptide was found to contain the amino acids Phe, Gly, Met, Ala, and Ser. N-Terminal analysis yielded the PTH derivative of alanine. Partial hydrolysis of the pentapeptide yielded the dipeptides Gly-Ser, Ala-Gly, and Ser-Met. The peptide sequence is:
a. Ala-Gly-Ser-Phe-Met
b. Ala-Gly-Ser-Met-Phe
c. Phe-Ser-Gly-Met-Ala
d. Phe-Met-Ser-Gly-Ala
e. Phe-Ala-Gly-Ser-Met
how much aspirin is recovered? Solubility of aspirin in water at 25oC is one gram of aspirin per 300 milliliters of water.
This product contains no chemicals." What does this really mean and how do you feel about "natural" vs "synthetic" products?
albr3 is sold as a solution in ch2br2. this is a rather exotic solvent and somewhat difficult to work with as well
Calculate the energy of a photon emitted when an electron in a hydrogen atom undergoes a transition
A voltaic cell consists of an Mn/Mn2+ half-cell and a Pb/Pb2+ half-cell. Calculate [Pb2+] when [Mn2+] is 1.1 M and Ecell = 0.35 V. How about when [Mn2+] is 3.1 M and Ecell = 0.45 V. Calculate the Molarity for both situations.
the two amino acids, glycine and alanine, can form two different dipeptides. Draw one of the possible dipeptides as it would appear at a pH of 7. Be sure to include any necessary nonzero formal charges in your drawing
Determining System Equilibrium, A one-litre cylinder at 458'C is found to contain 0.36 moles of HI (g), 0.15 moles of I 2(g), and 0.18 moles of H2(g). Is this system at equilibrium?
A study of the system 4NH3(g)+7O2(g)--2N2O4(g)+6H2O(g), was carried out. A system was prepared with [NH3]=[O2]=3.60 M as the only components initially.
A system receives 729 J of heat and delivers 4,104 J of work to its surroundings. What is the change in internal energy of the system (in J)
A gas mixture composed of helium and argon has a density of 0.719g/l at a 743mmHg and 298k . What is composition of mixture by volume?
A mixture of 9.0g CH4 and 9.0g Xe is placed in a container and the total pressure is found to be 0.40atm. Find the partial pressure of CH4
The standard enthalpy of atomization of an element is the energy required to convert one mole of an element in its most stable form at 25 Celsius to one mole of monoatomic gas.
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