Table 3.

Sequence identity comparison of S. metallicus Cop proteins to those in other Sulfolobales.

S. metallicus protein	% Identity to homologue in other Sulfolobales
	S. solfataricus P2	S. acidocaldarius	S. tokodaii	M. sedula
CopA1	51	43	44	45
CopA2	88	46	49	50
CopM1	63	69	71	71
CopM2	89	72	70	77
CopT1	36	27	30	32
CopT2*	90	52	52	53

Boldface type indicates to which organism the S. metallicus homologue shows the highest sequence identity.

*Refers to the analysis obtained using the uncompleted amino acid sequence of CopT2, which represents ~90% in length when compared with S. solfataricus CopT sequence.