The Student Room Group
Competition - post a photo you've taken of nature >>
Competition - post a photo you've taken of nature >>
Competition - post a photo you've taken of nature >>

Amino acid forms

For pH 7 and pH 9, what are the amino acid forms???
Zwitterionic, neutral, deprotonated or protonated. Gotta have two, representing an acid and base.
I'm a bit confused by your question, but if you're talking about pH 7 and pH 9, the first thing that comes to mind is a Zwitterionic Amine where a NH3+ and COO- are present. At low pH, COOH is formed and at high pH NH2 is formed
(edited 3 years ago)
Forgot to mention above as well something known as Isoelectric Point, it is where the Amino acid has no overall charge and is usually around pH 6
Zwitterion.png
As we can see in the image here, the amino acid has a NH3+ and COO- group so there is no overall charge.

At a low pH, the COO- is protonated forming COOH

At high pH, the NH3+ group is Deprotonated and NH2 is formed

Zwitterion pH.png
Hopefully these diagrams also explain my first response better :smile:
(edited 3 years ago)

Quick Reply

Related discussions

Latest

Trending

Trending

Articles for you