Give the pka values for the protonatable groups of cysteine, and then calculate its pi. (answers within ± 0.3 ph units will be accepted).

Answer :

Explanation: Cysteine is a special amino acid having 3 protonable groups which means this group will have 3 pKa's.

The structures wit their pKa values are given in the image below.

pI or isoelectric point is the pH at which the amino acid have no net charge.

Therefore, in the case of cysteine the net charge is 0 in the structure B, so pI will be present between and .  

pKa values of cysteine are:

pI will be

pI = 5.02

convalent bond :

is a chemical bond formed by the sharing of electron between 2 atoms.

it is the direct chemical bond between 2 atoms.

in bond formation atoms are involved here.

electrovalent bond:

is a chemical bond defined as electroststic attraction between 2 atoms.

it is the electrostatic attraction between 2 atoms.

in bond formation, ions are involved here.

hope it

and ur welcm

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