10 points, name this hard protein that makes up the cell wall of fungi and the exoskeleton of insects and arachnids.
This material can be used industrially to purify water because of its ability to bond with both organic PCBs and heavy metals often found in waste water. This material consists of repeated N-acetyl-glucosamine residues linked together by beta-1-4 glycosidic bonds, although those bonds can be hydrolyzed by lysozyme, which protects mammals from infection.  Although in its natural state this material is soft and leathery, when it mixes with sclerotin, it becomes encrusted with calcium carbonate. It is believed to have made up the bodies of trilobites as early as the Pre-Cambrian Era. 10 points, name this hard protein that makes up the cell wall of fungi and the exoskeleton of insects and arachnids.
This material can be used industrially to purify water because of its ability to bond with both organic PCBs and heavy metals often found in waste water.
{chitin}