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it's a bio-chem problem.

"I have attached a titration of a mock amino acid with OH-. I have labeled the different charge states of the amino acid as I, II, III, IV. I have labeled different points on the titration curve as A, B,...G. I want you to tell me which form(s) of the species I,II,III,IV predominates (is present at greatest concentration) at each of the lettered points on the curve. I would also like you to calculate the PI for the molecule.
Relevant pKa's are below:

pKa of alpha NH3 group=9.4
pKa of alpha COOH= 1.95
pKa side chain NH3=approx 10

Foo Coo- COOH H3Nt-CH CH2 CH2 H2N-CH H2N-CH CH2 CH2 CH2 CH2 CH2 CH2 NH3 + NH3 للللللل pH 6 2tka i 0 0.5 1 1.5 2 2.5 Equivalen
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Answer #1

PI l Iguelectric point, It is the pH, at which molecules carnes do electrical charges.ge. electrically Nuetral, 1 PI = pka, tCool Aquipos große du mois de, ahul pf = 9.7 soils it due to in presense of the N o It is a basic - Amine ipotein) having gre

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