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
Polymer-drug conjugates tested in drug conjugates. Due to successful clinical proof-of-concept, second-generation conjugates are now being developed. Experimental chemotherapy and novel polymer-based combinations are currently under investigation. Instead of passive targeting developed so far, new approaches will provide receptor-mediated delivery. This will enable selective delivery of anticancer conjugates. A natural polymer dextrin and pendant chain polyacetals, have shown ability of pH-dependent degradation after incorporation into cell compartments. Also diethylstilboestrol (DES) conjugates can undergo pH-dependent degradation. Polymer-Directed Enzyme Prodrug Therapy (PDEPT) is an example of two-step anticancer treatment. Polymer-drug conjugates Polymer-drug conjugates are nano-medicine products under development for cancer diagnosis and treatment. There