Table 1.

E219R enhances Ca²⁺ sensitivity derived from both Ca²⁺ binding sites

Construct	ΔV1/2 (mv)	Construct	ΔV1/2 (mv)	Ratio
WT	190.0	E219R	318.1	1.67
D367A	69.9	E219R/D367A	127.9	1.83
E535A	80.2	E219R/E535A	126.5	1.58
5D5N	124.7	E219R/5D5N	203.5	1.63
D367A/5D5N	12.0	E219R/D367A/5D5N	18.5	1.54