recipe for chiroptera elastin, aka recipe for chiroptera elastin, elastin recipe, recipe chiropera elastin, recipe for elastin, recipe elastin, and elastin protocol

A print-out describing how to purify elastin from bat cartilage.

It tells you how to make a vial of chiroptera-derived elastin with the following components:

4 - bat wings
1 - bottle of PCB

Making this would take good familiarity with chemistry.
In the upper right corner is a note: 'First discovered by Dr. Zaylin.'

It weighs about 100 grams. It is a chemistry protocol. You have no idea what it might be worth.