Which amino acid has a net charge of “+ 0.09” at pH 7? Show all calculations....
Which amino acid has a net charge of “+ 0.09” at pH 7? Show all calculations. Draw the structure of the amino acid that would predominate at this pH. (The answer should be Histindine; draw the structure of histidine. Calculate the net charge using a H-H equation. Please walk through every single step as if I was five years old I am very confused).
Homework Answers
Henderson Hasselbach equation
pH = pKa + log (base/acid)
Base / acid = 10 ^ (pH - pKa)
Base + acid =1 (i.e. total number of acid and base molecules is 1)
So base = 1- acid
So , 1-acid / acid = 10^ (pH- pKa)
Base = 1/ 1+(10^ (pH-pKa))
Acid = 1/1+(10^(pKa-pH))
Base + Acid =0.09
pH=7
Putting the numbers
PKa =6.1 ,i.e. histidine
At this pH protonated form predominates.
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Which amino acid has a net charge of “+ 0.09” at pH 7? Show all
calculations....
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#37 that is the complete question.
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any help on that would be greatly appreciated!
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#37 that is the complete question.
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a) Use the 3 letter symbols for a 6 amino acid peptide chain containing at least one polar and at least one acidic or basic amino acid. (All at physiological pH.) Asp - Gly-Glu-Tyr- Phe- Ala OM b) Draw the primary structure with its peptide bonds, side chains, etc. in the correct order. CH3 NH - E-N -CH. - CH - C- 2-I U=0 -ch- & N-chi- CH₃ CH ₂ Coo CH н My Coo...
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dont not expect anyone to create the spreadsheet, however I am
totally lost on the calculations and values that must be added, so
any help on that would be greatly appreciated!
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