Amino Acid Question (removing amine)

[752779]

Arginine also so contains an amine group. How come the answer is not C? If anyone know please explain.
Thank you

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[aldol16]

It removes an amide, not an amine.

 

[To be MD]

Hey tran,

The amide functional group is R-C(=O)NH group. Notice that the carbonyl carbon is only connected to one N.

The only two amino acids with amide functional groups are Asparagine and Glutamine. The latter is a bit confusing because it calls itself "Glutamine" and not "Glutamide" as one might expect, but the key for Glutamine (and for that matter Glutamate) is to picture an extra -CH2 added in on the Asparagine/Aspartate chain. If it helps, a glutton is one who purposefully eats in excess to a fault, so think fat (or more) for Glutamine/Glutamate.

The Arginine has a NH2=C(=NH2+)-NH2 functional group which is not an amide because there are 3 N's the carbon is connected to and not 1.

 

[aldol16]

The Arginine has a NH2=C(=NH2+)-NH2 functional group which is not an amide because there are 3 N's the carbon is connected to and not 1.

If you're interested, that group is called a guanidinium (similar to an agent commonly used in laboratories to denature proteins).

 

[752779]

Hey tran,

The amide functional group is R-C(=O)NH group. Notice that the carbonyl carbon is only connected to one N.

The only two amino acids with amide functional groups are Asparagine and Glutamine. The latter is a bit confusing because it calls itself "Glutamine" and not "Glutamide" as one might expect, but the key for Glutamine (and for that matter Glutamate) is to picture an extra -CH2 added in on the Asparagine/Aspartate chain. If it helps, a glutton is one who purposefully eats in excess to a fault, so think fat (or more) for Glutamine/Glutamate.

The Arginine has a NH2=C(=NH2+)-NH2 functional group which is not an amide because there are 3 N's the carbon is connected to and not 1.

Thanks you for such grate explanation.

 

[752779]

It removes an amide, not an amine.

Thanks so much,

It removes an amide, not an amine.