T=28 icosahedral capsid


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The capsid is composed 60 asymmetric units made of 28 proteins (T=28), for a total of 1680 capsid proteins. These capsids are skewed, and are therefore described as either right- (dextro) or left- (laevo) handed.



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Icosahedric triangulation number is calculated following Caspar and Klug system

Viral molecular biology Virion
Virus entry
Virus latency
Transcription and replication
Host-virus interactions
Virus exit
Icosahedric capsids Virus symmetry and T number
T=1
T=2*
T=3
T=pseudo3
T=4
T=7
T=9
T=13
T=16
T=21
T=25
T=27
T=28
T=31
T=75 bacterial carboxysome
Links Uniprot Keyword:
GO ontology:
Virus dsDNA
Sphaerolipoviridae