TABLE 2.

H-D exchange rates in the presence of subsaturating Ca²⁺ concentration

Subunit	Peptide or group of peptides	H-D exchange rate, s−1	Log (protection factor)	Assigned exchange region
TnC	1–12	0.048 ± 0.031	1.79	8–10
	13–24	0.060 ± 0.020	1.97	14–18
	”	0.00048 ± 0.00013	4.07	19–24
	25–57	0.0006	3.43	26–28
	“	0.028 ± 0.011	2.30	35–37
	”	0.028 ± 0.011	2.25	38–42
	“	0.0003 ± 0.0001	4.21	43–48
	64–74	0.067 ± 0.055	1.85	64–66
	118–132a	0.06 ± 0.02	1.79	119–122
	”	0.038 ± 0.012	2.12	123–124
	136–150	0.095 ± 0.040	1.85	137–140
	154–161	0.0009 ± 0.0003	3.37	155–157
TnI	54–78a	0.0006 ± 0.0002	3.82	59–62
	62–88a	0.14 ± 0.06	1.63	71–82
	91–96	0.00028 ± 0.00004	3.94	92–96
	97–116	0.066 ± 0.024	1.93	98–103
	“	0.00025 ± 0.00016	4.04	111–116
	117–124	0.052 ± 0.014	1.89	118–124
	125–152	0.0024 ± 0.0012	3.18	128–131
	”	0.034 ± 0.020	2.03	144–148
	156–169	0.07 ± 0.01	1.80	163–169
TnT	182–187	0.06 ± 0.04	2.36	183–185
	188–224	0.07	1.92	214–219
	224–243a	0.0011 ± 0.0003	3.62	225–230
	“	0.00015 ± 0.00004	4.37	231–233
	”	0.0004 ± 0.0001	4.21	238–239
	243–264a	0.0011 ± 0.0003	3.60	259–264

^a Merged data saturating and subsaturating Ca²⁺.