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Assume that the amino acids with ionizable side chains have the following pKas: Asp 3.65; Glu 4.25; His 6.0; Lys 10.53, Arg 12.48; Cys 8.18; Tyr 10.07. Also Assume that the a-amino group has a pKa of 9.62, and the a-carboxyl group has a pKa of 2.30. What would be the approximate pI value of the following protein (note that it is a hemoglobin, though that doesn't matter) --? (explain your logic)
Amino Acid - Moles/Mole ProteinLys - 11His - 6Arg - 3Asp - 8Asn - 4Thr - 1Ser - 10Glu - 4Gln - 6Pro - 3Gly - 20Ala - 28Cys - 1Val - 10Met - 5Ile - 8Leu - 11Tyr - 3Phe - 3Trp - 2
A 4.70 g nugget of pure gold absorbed 260 J of heat. The initial temperature was 28.0°C. What was the final temperature.
For carbon tetrachloride, the boiling point constant is 5.03°C · kg/mol, and the boiling point of pure carbon tetrachloride is 76.50°C.
write the two resonance hybrids for the carbocation that would be formed by protonation at C-1 of 2-methyl-1,3-pentadiene. Without doing a calculation
Mechanism for bromobenzene + magnesium turnings + annhydrous diethyl ether + benzaldehyde + H2SO4
A metal, M, was converted to the chloride, MCl2. Then a solution of the chloride was treated with silver nitrate to give silver chloride crystals, which were filtered from the solution
Atoms contain protons. 2)Nuclei move out of the paths of the alpha particles. 3)Neutrons have zero charge.
A buffer is prepared by mixing 429 mL of 0.255 M NaOH with 677 mL of 0.795 M sodium bicarbonate (NaHCO3). Given that the Ka1of H2CO3 is 4.5 x 10-7
Although the double bond, in total, is stronger than a single bond, the pi bond itself is weaker and can react with electron-deficient species such as a hydrogen ion.
A buffer is made with 25mL of 1.0 M HC2H3O2 and 25mL of 1.0 M NaC2H3O2. Calculate the theoretical pH. I know the pH is 4.74.
A cumbustion analysis was carried out on 1.621g of newly synthesize compound which was known to contain only carbon,hydrogen and oxygen.
When making up an unknown solution for absorption measurements, a good plain is to make up a solution that is rather on the concentrated side, measure its absorbance and compare it to the absorbance range of your standard curve. If it is higher th..
Calculate [H+] and the pH of the following solutions.
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