Biochemistry - Structure and Properties of Amino Acids - Discussion

Discussion Forum : Structure and Properties of Amino Acids - Section 1 (Q.No. 1)
When the amino acid alanine (R-group is CH3) is added to a solution with a pH of 7.3, alanine becomes
a cation
a zwitterions
an isotope
Answer: Option
No answer description is available. Let's discuss.
14 comments Page 2 of 2.

JAPAN MAHINDA said:   9 years ago
At ph 7.3 is nearly physiological and alanine exist as a zwitterion as NH3+- C-COO-, SO THE NH3+ and the COOH- CREATES A DIPOLE(ZWITTERION).

Regina Sanco said:   10 years ago
The alanine becomes zwitter because at a PH of app 7.3, the carboxyl group COOH of alanine becomes fully deprotonated (a proton is removed) forming COO- whiles the amino group becomes fully protonated forming an NH3+.

GEOFREY COSMAS said:   10 years ago
The alanine become zwitterionic character because at 7.3 the carboxylic group already ionized and the amino group is still protonated contribution the neutrality, which we call as its ISOELECTRIC POINT. FROM Tanzania.

Mamta kushwah said:   1 decade ago
Because they have pka value is up to 6.7 .

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