Betazoid are a part of telepathic humanoid civilization.
This was an undistinguishable civilization from humans; means they looked very similar to humans. Their eye coloration was very different from humans. The REM movements of their eye are also different.
One interesting fact is that in betazoids, four nucleotides code for one amino acid; i.e. they had a four letter genetic code. Their genes do not have introns; so, they have a fairly long DNA.
For the above answer: (3332/4) = 833 amino acids is the correct answer.