Tissue-specific expression of zebrafish IFIT genes.
A. Constitutive expression of IFIT genes in tissues of adult zebrafish (S: Spleen; L: Liver; K: Kidney; G: Gill; CF: Caudal fin; H: Head; M: Muscle; I: Intestine). For basal expression of each IFIT form, tissues were sampled and pooled, yielding a total of 4 pools of 5 fish per organ. The relative expression level of each gene, normalized to the expression level of the 18 S ribosomal RNA gene in the same tissue, was expressed as arbitrary units. The graphs represent the mean ± standard error of 4 independent samples. B. Relative proportion of the IFIT transcripts in different zebrafish tissues.