the right answer is Chitinase
I admit that Lysozyme fits with the description provided in the riddle
pretty good as well (like "...a part of the defense systems against fungal and invertebrate attack").
Anyway, you were the only participant this time,
so you'll get the bonus.
just sent you 100 STEM, 100 CCC, 100 PAL & 5 Hive
thanks for your interest )