Apr 8, 2011

Aminoacid 2 - Arginine

Arginine is also an α-amino acid.
Molecular Formula :- C6H14N4O2
Molar mass :- 174.2 g mol−1
The amino acid side chain of arginine consists of a 3-carbon aliphatic straight chain, the distal end of which is capped by a complex guanidinium group.With a pKa of 12.48, the guanidinium group is positively charged in neutral, acidic and even most basic environments, and thus imparts basic chemical properties to arginine. Because of the conjugation between the double bond and the nitrogen lone pairs, the positive charge is delocalized, enabling the formation of multiple H-bonds.

3D structures:

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