Cell wall There are several groups of organisms that have been called "fungi". Some of these groups (Oomycete and Myxogastria) have been transferred out of the Kingdom Fungi, in part because of fundamental biochemical differences in the composition of the cell wall. Most true fungi have a cell wall consisting largely of chitin and other polysaccharides. True fungi do not have cellulose in their cell walls. In fungi, the cell wall is the outer-most layer, external to the plasma membrane. The fungal cell wall is a matrix of three main components: Like plants, algae have cell walls. Algal cell walls contain either
Insect cell culture Insect cell culture The use of insect cell lines as production hosts is an emerging technology for the production of bio pharmaceuticals. There are currently more than 100 insect cell lines available for recombinant protein production with lines derived from "Bombyx mori", "Mamestra brassicae", "Spodoptera frugiperda", "Trichoplusia ni", and "Drosophila melanogaster" being of particular interest. Insects cell lines are commonly used in place of prokaryotic ones because post-translational modifications of proteins are possible in insect cells whereas this mechanism is not present in prokaryotic systems. The Sf9 cell line is one of the most commonly used lines in insect cell