A versatile palindromic amphipathic repeat coding sequence horizontally distributed among diverse bacterial and eucaryotic microbes

Table 2 Distribution of PARCEL-containing ORFs among the chromosomes of two Ostreococcus species

Chromosome designation [number of PARCEL-containing ORFs]*		comments
O. lucimarinus	O. tauri
chx. 1 [1]	chx. 1
chx. 2 [1]	chx. 2 [1]	Chromosome 2 of each species is potentially of exogenous origin*
chx. 3	chx. 3
chx. 4 [1]	chx. 4
chx. 5	chx. 5
chx. 6	chx. 6
chx. 7	chx. 7
chx. 8	chx. 8 [3]
chx. 9 [1]	chx. 9
chx. 10	chx. 10
chx. 11	chx. 11 [1]
chx. 12	chx. 12
chx. 13	chx. 13	Chromosome 13 of O. tauri shares regions with two chromosomes of O. lucimarinus*
chx. 14 [2]	chx. 15
chx. 15	chx. 16
chx. 16	chx. 17 [1]
chx. 17	chx. 18
chx. 18 [1]	------------	Chromosome 18 of O. lucimarinus is potentially of exogenous origin*
------------	chx. 19 [2]	Chromosome 19 of O. tauri is potentially of exogenous origin*
chx. 19 [1]	chx. 20
chx. 20 [1]	chx. 14
chx. 21	chx. 13	Chromosome 13 of O. tauri shares regions with two chromosomes of O. lucimarinus*

* Equivalent paired chromosomes are listed on the same line. Those harboring PARCEL-containing ORFs are indicated in bold font with the number of ORFs in brackets. Chromosomal designations and interpretations are described in [66].

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