Table 1.

Estimation of maximum sulfide-binding capacity by R. pachyptila Hbs

	V1	V2	C1	Ref.
Proportion, (range)	62.17	37.83	100	7
	(53.27–71.07)	(46.73–28.93)
Heme, mM (range)	2.17	1.32	1.9	7
	(1.86–2.48)	(1.63–1.01)
Heme, no.	144	24	24	12
Free Cys, no.	84	14	14	18
Cys on linkers, no.	432	0	0	18 and this study
No. Cys/no. heme	3.5	0.58	0.58	This study
Sulfide saturation, mM (range)	7.59	0.76	1.10	This study
	(6.51–8.68)	(0.94–0.58)

Proportions of each Hb present in either vascular blood or coelomic fluid are from ref. 7. The heme concentrations for each Hb were estimated by using the values of 3.5 mM and 1.9 mM of heme for the vascular and coelomic fluids, respectively (7).