TABLE 2.

Features of the ORFs of the tfd_I and tfd_II gene clusters

ORF	Ribosome binding site	bp between RBS and start codon	Start codon	Location on sequencea	Length of ORF (bp)	Predicted molecular mass (kDa)	Pairwise identity (%)b
tfdC	GGAGG	4	GTG	337–1104	765	28.3
tfdCII	GAAGAG	8	ATG	2856–3617	759	28.1	60
tfdD	GGGGG	7	GTG	1101–2213	1,110	39.7
tfdDIIc	−/GAAGCG	−/9	ATG/GTG	1610/1694–2659	1,047/963	36.9	35
tfdE	GGAG	7	ATG	2288–2992	702	25.4
tfdEII	GAAGG	7	ATG	3639–4346	705	25.4	15
tfdF	GAAGG	7	ATG	2989–4053	1,062	37.9
tfdFII	GGGGG	5	GTG	4348–5427	1,077	37.5	45
tfdB	GGAGG	5	ATG	4398–6194	1,794	65.4
tfdBII	GGAG	5	ATG	5495–7255	1,758	64.4	62

^aGenBank accession no. M35097 (tfdCDEFB) and U16782 (tfd_II cluster). 

^bCalculated at the amino acid level. 

^cThe slash indicates that there is no ribosome binding site corresponding to the ATG codon.