BMC Ecology and Evolution

Table 2 Nucleotide composition of selected genes acquired by protists through HGT

From: Horizontal gene transfer in chromalveolates

Species	GC content (%)
	Genome		Gene¹
	average	range	WECE	MVIM	Epimerase	CAS-like	MQO	IDH	EF2
Karenia brevis	50.86	45–56	51.84	50.59	53.09	54.44	53.92	53.27	65.16
Karlodinium micrum	49.50	44–54	-	49.30	-	51.50	49.35	49.60	51.94
Alexandrium tamarense	58.93	50–67	-	-	-	67.84	60.75	59.26	57.92
Amphidinium carterae	54.64	50–58	-	-	-	-	-	53.75	56.03
Heterocapsa triquetra	63.64	57–69	-	-	-	-	63.64	63.90	62.93
Lingulodinium polyedrum	62.98	55–69	-	-	-	-	-	57.45	66.78
Phaeodactylum tricornutum	53.86	49–60	-	-	-	-	-	53.40	53.19
Phytophthora ramorum	61.15	54–67	-	-	60.65	-	-	-	62.59
Thalassiosira pseudonana	49.67	45–54	-	-	46.64	-	-	49.91	50.78
Isochrysis galbana	61.38	54–67	-	-	-	67.41	-	58.51	64.31
Emiliania huxleyi	67.75	63–72	-	-	-	69.96	62.64	-	-
Pavlova lutheri	64.36	59–66	-	-	-	-	-	-	64.48
Giardia lamblia	52.11	44–63	-	-	52.16	-	-	-	56.90
Spironucleus barkhanus	43.02	31–63	-	-	52.88	-	-	-	42.72
Jakoba bahamiensis	60.70	56–62	61.39	60.54	-	-	-	-	60.54
Seculamonas ecuadoriensis	61.63	56–64	61.66	-	-	-	-	-	62.53
Sawyeria marylandensis	32.00	22–41	30.51	24.36	-	-	-	-	30.10
Euglena gracilis	56.53	45–68	-	-	-	-	-	-	51.12
Leishmania major	60.95	55–64	-	-	-	-	-	-	63.08
Trypanosoma brucei	54.53	42–59	-	-	-	-	-	-	53.21

Nucleotide composition is given for six out of 16 bacteria-derived genes listed in Table 1. The GC content of all bacteria-derived genes identified in Karenia brevis does not deviate significantly from the average. The underlined numbers indicate a gene GC content that significantly deviates from the genome GC content. Dashes indicate that the gene have not been found for this species; numbers in italic indicate GC contents for the genes that have a phylogeny consistent with the species phylogeny.

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