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Apamine is a small monomeric peptide toxin present in the venom of the honeybee. It has the sequence: CNCKAPETALCARRCQQH (a) It is known that apamine does NOT react with iodoacetate. How many disulfide bonds are present? (b) Suppose trypsin cleavage gave two peptides. Where is (are) the S-S bond(s)? (Hints: If cut by trypsin, but still held together by a disulfide bond, count it as a single peptide. Also, do not count a single amino acid as a "peptide.")
How many molecules of acetylene (HCCH) react with 149 molecules of oxygen to produce carbon dioxide and water?
calculate how many protons are required to pass through the xeno-FoF1-ATP synthase complex to synthesize one ATP
At 1000 deg. K, a sample of pure NO2 gas decomposes. 2NO2(g)f/r2NO(g) + O2(g) The equilibrium constant Kp is 158. analysis shows that the partial pressure of O2 is 0.14 atm at equilibrium.
For each of the following salt solutions, indicate whether the solution will be acidic, basic or neutral. Then using data given below, calculate [OH-] or [H3O+] and pH for each solution.
the freezing point of the resulting solution is 3.77*C. The freezing point of pure benzine is 5.48*C. Calculate the molar mass of the compound.
When 0.097 moles of Magnesium hydroxide (Mg(OH)2) is dissolved in water, how many moles of ions are released into the solution ?
The heat fusion for water is 80. cal/g. How many calories of heat are released when 20 g of water is at 0 C is frozen to ice ?
Calculate the force of attraction between a cation with a valence of +2 and an anion with a valence of -2, the centers
Draw a doagram to show the changes in potential energy that occur from the rotation around the C1-C2 bond of 1-bromopropane.
Calculate the average speed of a gas that has a molar mass of 2.08 × 10-2 kg /?mol at a temperature of 22°C. The value for the gas constant, R, is 8.314 J /?mol K.
18.25 ml of 0.197 M NaOH will neutralize 10.00 ml of what molar concentration of H2SO4 solution?
Nitric acid can be produced by the reaction of gaseous nitrogen dioxide with water. 3 NO2(g) + H2O(l) -→ 2 HNO3(l) + NO(g) If 927 L of NO2 gas react with water, what volume of NO gas will be produced? Assume the gases are measured under the same c..
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