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Hello, I am interested in these specific qustions, particularly 5B, 5C and 4. Could You please provide the

informative explaination of how to solve/answer these problems?

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4) [2 point] The pKa values for the amino acid cysteine are 1.8, 8.3, and 10.8.
Assign these pka values to the functional groups in cysteine and draw the
structure of the molecule in aqueous solution at the following pis: 1, 5, 9, and
12

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5) (10 points) A) Please name and abbreviate (one-letter and three-letter code)
the illustrated aminoacids (D- or L-form).
B) Please describe one one stereoselective and one non-stereoselective
synthesis route (incl. mechanism) to obtain the aminoacid G.
C) In the case of a racemic mixture, please describe the procedure to separate
the synthesized enantiomers.
Abbreviations
Name
Abbreviations
Name
HS
OH
OH
NH2
NH2
HaC
OH
Haces
NH2
NH2
CH3 9
HaC
OH
OH
H2N
NH2
NH2
OH
OH
HIN
CH3 NH2
NH2
CH3 0
HaC-
OH
NH2
NH2
OH
HIN
NH2
NH2
OH
OH
OH
NH2
-OH
HO
OH
HO OO NH2
NH2
OH O
-OH
HaC
OH
NH2 NH2
NH2
OH
OH
HaNO NH?
HO
NH2

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