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A form of the polypetide hormone angiotensin II has the amino acid composition ( ASP, ARG, ILE, MET, PHE, PRO, TYR, VAL). The following observations are made. A. Trysin yields a dipeptide containing ASP and ARG and a hexapeptide with all the rest. B. Cyanogen Bromide cleavage yields dipeptide containing PHE and PRO and a hexapeptide containing all the others C. Chymotrypsin cleaves the hormone into two tetrapeptides of composition ( ASP, ARG, TYR, VAL) and (ILE, MET, PHE, PRO) D. The dipeptide of composition (PRO, PHE) cannot be cleaved by either chymotrypsin or carboxypeptidase ( cleaves any C- terminal amino acid) What is the sequence of this protein?
if 0.55 g of a gas dissolves in 1.0 l of water at 20.0 kPa of pressure, how much will dissolve at 110.0 kPa of pressure?
calculate the sodium ion concentration in a solution formed by diluting 35.00 mL of a .585 M sodium phosphate solution to a final volume of 145.00 mL
What are the concentrations of HSO4-, SO42-, and H+ in a 0.255 M KHSO4 solution? (Hint: H2SO4 is a strong acid; Ka for HSO4- = 1.3 10-2.)
a quantity of water is heated from 25.0 C to 36.4 C by absorbing 325 joules. what is the mass of the water?
Calculate work (in kJ) when 422 g iron (III) oxide (MM = 159.7 g/mol) reacts with excess carbon to produce carbon dioxide gas at 445 K:
A proton in a linear accelerator has a de Broglie wavelength of 144 pm. what is the speed of the proton?
In a calorimeter, 10.0 g of ice melts at 0oC. The enthalpy of fusion of the ice is 334 J/g. How much heat was absorbed?
Assume that the wet limestone process requires 1 metric ton of calcium carbonate to remove + 85.0 % of the sulfur from 4 metric tons of coal containing + 10.0 % S Assume that the sulfur product is calcium sulfate.
a 25g sample of alloy at 95 degrees celsius is placed in 50.g of water at 20 degrees celsius if the final temperature reached by the alloy sample and water is 27 degrees celsius what is the specific heat?
A solution is 40% acetic acid by mass. The density of this solution is 1.049 g/mL. Calcu late the mass of pure acetic acid in 480 mL of this solution at 20 C
Which of the following has the smallest mass? a. 3.50 x 1023 molecules of I2
Give the number of electrons, Protons and neutrons in 24NA and give the electron configuration of the following A: A1 B: F- (- is at the top)
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