Bushings are one of those things that most people don't really think about until they find out they have a $600 mechanic's repair bill on their hands. Some even think the mechanic is trying to rip them off when they mention bushings needing replaced.
Lignin is a phenolic compound, chemically related to benzene. The cell walls of fungi are diverse among the taxonomic groups, but most contain chitin microfibrils embedded in a polysaccharide matrix and covered with a loose coating of additional molecules combining sugars and peptides (amino acid chains).
1 Cell walls of algae have a variety of different cell wall types and include cellulose, calcium carbonate, silcone dioxide, proteins and even polysaccharides. 2  The cell walls of fungi are made up of chitin (a nitrogen-containing polysaccharide) and is similar to that found in the exoskeletons of arthropods & crabs.