The cyst walls of bacteria are formed by the thickening of the normal cell wall with added peptidoglycan layers whereas the walls of protozoan cysts are made of chitin , a type of glycoprotein .
The cyst walls of bacteria are formed by the thickening of the normal cell wall with added peptidoglycan layers . The walls of protozoan cysts are made of chitin , a type of glycoprotein .