•Critical
for binding of host cell
receptors to facilitate
entry of host cell
Envelop Protein (E)
•Interacts
with M to form viral envelop
Membrane Protein (M)
•Central
organizer of CoV assembly
•Determines
shape of viral envelop
NOTE: Some
CoV’s do not need to have the full ensemble
of structural proteins to make virions,
highlighting that certain proteins may be
dispensable or compensated by the function
of non-structural proteins.