Table 1.

Identity matrix for IsiA, Pcb, and PsbC proteins of prochlorophytes and cyanobacteria

	1	2	3	4	5	6	7	8	9	10	11	12	13
1. PcbA P. hollandica		65	45	50	60	58	56	58	59	54	51	50	51
2. PcbB P. hollandica	70		45	52	59	57	54	54	59	55	47	50	54
3. Pcb P. marinus (Sarg)	48	46		75	48	47	47	45	46	45	40	39	39
4. Pcb Prochlorococcus sp. (Med)	51	52	76		55	55	53	52	52	54	45	45	47
5. Pcb P. didemni	62	60	48	51		60	56	61	59	60	56	56	56
6. IsiA-like P. didemni	56	55	46	53	59		78	83	78	76	57	56	59
7. IsiA Synechocystis sp. PCC6803	58	54	49	51	57	76		76	74	73	51	49	53
8. IsiA Synechococcus sp. PCC7942	58	54	48	51	61	81	76		76	74	52	52	54
9. IsiA Anabaena sp. PCC7120	60	58	47	51	60	77	73	75		74	54	56	56
10. IsiA Synechococcus sp. PCC7002	55	53	48	53	59	76	75	75	72		55	56	58
11. PsbC P. hollandica	46	43	36	40	52	56	49	49	50	52		78	80
12. PsbC Synechococcus sp. PCC6803	46	46	37	43	54	55	49	51	53	53	81		88
13. PsbC Synechococcus sp. PCC7942	45	47	37	43	53	58	50	50	52	53	79	87

Pairwise amino acid identity (%) for protein sequences derived from pcb genes of P. hollandica, P. didemni, Prochlorococcus sp. Med and Sarg strains, and isiA and psbC from cyanobacteria and P. hollandica. Sequences were aligned using clustal v (19). (Lower) % identity calculated on basis of the number of residues in the shorter sequence; (Upper) % identity calculated on basis of the 206 common residues from all sequences.