Chemistry, 14.02.2020 23:50 painespeach1849

Each ionizable group of an amino acid can exist in one of two states, charged or neutral. The electric charge on the functional group is determined by the relationship between its pKa and the pH of the solution. This relationship is described by the Henderson-Hasselbalch equation.

a) histidine has three ionizable functional groups with pKas of 2.0, 6.0, and 10.0 respectively. Draw the structure of histidine in each ionization state. What is the net charge on the histidine molecule in each ionization state?

b) using structures in (a) indicate the predominant ionization structures of histidine at pH 1, 4, 8, and 12. Note that the ionization state can be approximated by treating each ionizable group independently.

c) what is the net charge of histidine at pH 1, 4, 8, and 12? do not calculate fractional charges

d) briefly describe potential roles for the imidazole side chain of histidine in primary, secondary, tertiary, and quaternary protein structure.

Answers: 2

Show answers

Another question on Chemistry

Chemistry, 22.06.2019 03:30

Adrop of acetone (nail polish remover) has a mass of 35 mg and a density of 0.788 g/cm3. what is its volume in cubic centimeters?

Answers: 3

Answer

Chemistry, 22.06.2019 03:40

In an effort to address concerns about global warming, a power plant in portland,oregon is designed to take all of its exhaust gases from its boilers and recycle the co2 using the solvay process to make sodium hydrogen carbonate. the reaction is shown below. nh3(g) + h2o(l) + co2(g) + nacl(aq) → nahco3(aq) + nh4cl(aq) how many liters each of nh3 and co2 (both at stp) would be consumed to produce 3.00 kg of sodium bicarbonate? the volume of both nh3 and co2 would be

Answers: 1

Answer

Chemistry, 22.06.2019 06:00

There are 6.022, 104 atoms of hg in 1 mole of hg the number of atoms in 45 moles of hg can be found by multiplying 4.5 by 6.022, 102 which is the number of atoms in 4.5 moles of hg, correctly written in scientific notation with the correct number of significant figures? 0 21,109 0 21,100 271, 1024 27.099, 100 mark this and retum save and exit submit

Answers: 1

Answer

Chemistry, 23.06.2019 04:00

If you are told to get 100 ml of stock solution to use to prepare smaller size sample for an experiment, which piece of glassware would you use?

Answers: 3

Answer

You know the right answer?

Each ionizable group of an amino acid can exist in one of two states, charged or neutral. The electr...

Questions