The amino acid (R)-alanine is found in insect larvae. What is the Fischer projection of this amino acid?

1 Answer
Oct 31, 2014


(R)-alanine is the enantiomer of the more common L- or (S)-alanine. Their structures are below.

We need to orient the molecules so that C-2 and C-3 are in a vertical line with C-1 at the top.

H and NH₂ will be in front of the paper. COOH will be behind the paper.

The Fischer projections become

The NH₂ group in (R)-alanine ends up on the right.