Comparative synteny of hemoglobin gene clusters among sequenced teleost species. Schematic representation of annotated genes within the regions surrounding the hemoglobin gene clusters for Atlantic salmon and four annotated teleost genomes (O. latipes, D. rerio, G. aculeatus, T. nigroviridis). Colored blocks indicate shared or common genes as specified in the Figure legend. Black blocks indicate genes that are not shared within the indicated regions of any other species. Distances between genes vary (i.e., figure is not to scale); the start and end of the chromsome/group region is shown in base pairs (bp) for each of the annotated teleost genomes. Solid lines between predicted genes indicate that the order and orientation of the predicted gene relative to those neighboring it is known, whereas for Atlantic salmon fps 135 (chromosome 3), a single black dot between predicted genes indicates that the relative location of the predicted genes compared to those joined by solid lines is known, but their order and orientation (i.e., that of the sequence contigs on which they reside) relative to one another is not. Arrows indicate the direction of transcription of the gene relative to the location of the hemoglobin gene cluster; lack of an arrow indicates that the relative direction of transcription cannot be determined. For D. rerio chromsome 3, the gene for ELAV-like protein was found distantly downstream of the nearest common gene (Arylakylamine N-acetyltransferase 2), as indicated by the distance shown, with numerous predicted genes in between.