Table 1. Presence/absence of phnD and pstS genes in Prochlorococcus and SAR11 genomes.

	phnD	pstS
Prochlorococcus marinus str. MIT9313	+	++
P. marinus str. MIT9202	+	+
P. marinus str. MIT9211	+	+
P. marinus str. MIT9215	+	+
P. marinus str. MIT9301	++	++
P. marinus str. MIT9303	++	+++
P. marinus str. NATL1A	+	+
P. marinus str. MIT9515	+	+
P. marinus str. AS9601	+	+
P. marinus str. MIT9312	+	+
P. marinus str. NATL2A	+	+
P. marinus subsp. pastoris str. CCMP1986	+	+
P. marinus subsp. marinus str. CCMP1375	+	++
‘Candidatus Pelagibacter ubique' HTCC1062	−	+
‘C. Pelagibacter' sp. HTCC7211	+	+
‘C. Pelagibacter ubique' HTCC1002	−	−

A ‘+' sign indicates one copy of a gene, ‘++' two copies, ‘+++' three copies; while a ‘−' sign indicates the absence of a gene.