An Article in a Web Magazine. Provide the author name, article name in quotation marks, title of the Web magazine in italics, publisher name, publication date, medium of publication, and the date of access. Remember to use n.p. if no publisher name is available and n.d. if no publishing date is given.
The majority of viruses have capsids with either helical or icosahedral structure. Some viruses, such as bacteriophages, have developed more complicated structures due to constraints of elasticity and electrostatics.
Helical, Icosahedral and Prolate Viral Shapes. Before we get to the nitty-gritty of this lesson, I'd like to point something out. The protective protein shell of each virus is called a 'capsid.' This capsid is made up of protein subunits called 'capsomeres,' which are in turn made of subunits called 'protomers.'.