Amino Acids as buffers

[nacho]

Hey,
Just wondering, if we're given an amino acid, which happens to have a carboxylic acid in its' Z-group,
and they tell us to draw:
-the zwitter ion
-what it looks like in a basic environment

in either case, will there be a change in both carboxylic acids donate a H+ ion, or just the one off the main chain?

thanks.

[Russ]

99.9% sure it's both, afaik it's a common question for that reason

[nacho]

thanks.
also, what is the difference between beta-glucose and galactose?

[Charmz]

thanks.
also, what is the difference between beta-glucose and galactose?

Beta Glucose is an isomer and is used as a structural glucose i.e Cellulose cell wall.
Galactose is a monosaccharide which is different to beta glucose again because it has a different structure. It is less sweet than glucose.

EDIT: What are buffers? I got a few questions to do with them in my biology book.

[EvangelionZeta]

A buffer regulates the pH of a solution - in other words, it makes it resist a change in pH.