Two questions on Melatonin

[Mutant]

I am asking these questions because I am doing my project on the effects
of melatonin on the bacteria, Agrobacterium tumifaciens.

The questions are:

1.  What is the concentration of melatonin in the human body?
2.  What is the solubility of melatonin to water?  (a ratio)


thanks

mutant at sciboard.spdlan.louisville.edu