Chitin is also found in the cell walls of certain fungi and algae. Biology chitin definition of by the free dictionarycollins english dictionary. It is a primary component of cell walls in fungi, the exoskeletons chitine, which was derived 1821 from greek word (chiton), meaning covering although you may have never heard it, chitin abundant nature.
Amyotrophic lateral sclerosis (ALS) is a progressive neurological disease that causes muscle weakness and gradually impacts on the functioning of the body, leading to eventual death. It is also referred to as motor neuron disease or Lou Gehrig's disease, named after the famous baseball player who had the condition.
Familial ALS is caused by a mutation. A mutation is a genetic change or abnormality in a particular gene. Sorting out which gene is to blame is complicated. Humans have about 50,000 genes, and in most people with familial ALS scientists have not yet identified which gene is responsible for causing ALS.