The genome of the brown alga Ectocarpus siliculosuscontains a series of viral DNA pieces, suggesting an ancient association with large dsDNA viruses

Table 1 Comparison of the viral integrated fragments of regions A, B, C vs the EsV-1 genome.

Ectocarpus genomic region	G + C of the genomic region (%)	Position of the viral integrated fragments	G + C of the viral fragments (%)	Position of the similar fragment in the EsV- 1 genome	Identity
A	52.30
		7036 – 8941	48.22	332959 – 3720	5431/5414 (98 %)
		11748 – 15413	50.8
B	51.3
		7 – 934	52.5	37542 – 38469	833/938 (88%)
		6586 – 9708	51.5	40867 – 43989	2978/3153 (94%)
C	53.3
		25376 – 26459	51.75	190061 – 188934	989/1144 (86%)

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