hi.
Lysozyme is the right answer.

I'll discuss molecule proposed in this contest in detail (with explanation of the riddle)
in the ""Identify the molecule" contest #1 [Lysozyme]. Discussion. Winner announcement" post
which I'll publish in 3-4 days.

This time we have the winner.

thanks for participation.

From now on, there's 1 more rule.
If there's no correct answers provided by users,
then 100 STEM will be distributed equally among all participants with guesses.