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heptapeptide upon HCL hydrolysis produced equimolar amounts of ASP, CYS, GLU, LYS, PHE, TYR, VAL and ammonia. Exposure of the intact heptapeptide to FDNB followed by hydrolysis produced DNP-VAL. Treatment with trypsin produced a tripeptide , T1 and a tetrapeptide, T2. T2 had an absorbance peak near 260 nm and produced ammonia on hydrolysis. T1 had an absorbance peak near 275 nm ( which was greater than that of T1) and tested positive for sulfur. Exposure of the heptapeptide to chymotrypsin produced two tripeptides ( CT1 and CT2) which both had UV absorbances and ASP. CT1 contained sulfur and had the greater absorbance of the two chymotrypsin produced tripeptides. CT2 produced ammonia upon hydrolysis. When exposed to electrophoresis at pH6, T2, and CT1 were cations, T1 was an anion, and CT2 has essentially no charge. Deduce the sequence of the heptapeptides from the data.
consider a major oil spill in a lake ( a prototype situation related to Alaska Oil Spill few years ago and many subsequent spills) Amount of oil spilled is 2.9 mega gram (Mg).
Assemble the alcohols (have the formula of C4H10) in the order of increasing reactivity with concentrated HCl.
How many grams of the solid can be formed from 286 grams of calcium nitrate and 136 grams of Phosphoric acid?
62.8 mL of air is collected over water at 24 degrees celsius and 733 mm Hg pressure. find the volume of the dry air at STP
Calculate the mole percent composition of the mixture. Assume that the response of the detector (area per mole) is the same for each component.
What might you conclude about the structures of these 3 (X,Y,Z)compounds?
Suppose you have a sample of sodium weighing 11.50 g. How many atoms of sodium are present in the sample? What madd of potassium would you need to have the same number of potassium atoms as there are sodium atoms in the sample of sodium.
how many grams of Mg(OH)2 will be needed to neutralize 25ml of stomach acid if stomach acid is .10M HCL
TNT(trinitrotoluene) decomposes exposively What volumes of Hydrogen gas and Nitrogen gas are produced if 5.8 liters of CO is produced ?
Molecules can be as small as a few atoms or as large as thousands of atoms. In 1962, Max F. Prutz and John C. Kendrew were awarded the Nobel Prize for their discovery of the structure of hemoglobin.
Change in internal energy E, At 25'C, enthalpy change H for the combustion of liquid octane, C8H8(l), to form CO2(g) and H2O(l) is -5471kJmol-1
If a raindrop weighs 57 mg on average and 5.1 X 10^5 raindrops fall on a lawn every minute, what mass of rain falls (in kg) on the lawn in 1.5 hours?
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