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The genus is distinguished on the basis of genetic characters.
No details are available on the morphology of virions.
Genome (Lau et al., 2014, Bullman et al., 2014): up to 9,874 nt (5′-UTR: up to 1,009 nt; ORF: up to 8,610; 3′-UTR: up to 308 nt). The 5′-UTR contains a predicted type II IRES. The location of the cre has not been identified.
The deduced polyprotein has 2,855–2,870 amino acids. There is an L protein of unknown function. 1AB remains uncleaved. The 2A protein has an H-box/NC motif.
No virus has been isolated. Viral RNA was detected in faeces of chickens. Eight genetic types are distinguished by means of phylogenetic analysis.
Sicinivirus: from Gaelic sicín, "chicken"
There is only a single species in the genus.
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