pH

Predominant

form

Percentage

remaining activity

Soret

(nm)

Extinction coefficient

(mM⁻¹·cm⁻¹)

β (nm)

α (nm)

Soret

Shoulder

(nm)

CT II

(nm)

CT I

(nm)

Spin state

6.7

XH

100

408

173

-

-

-

504

638

HS

XH (5 mM CaCl₂)

100

408

173

-

-

-

506

642

HS

8.6

X⁻

73

408

148

-

-

-

507

636

HS

X⁻ (5 mM CaCl₂)

83

408

152

-

-

-

505

640

HS

8.6

Y⁻

10

412

103

531

559

368

-

-

LS

Y⁻ (5 mM CaCl₂)

60

409

126

-

-

-

508

636

HS

6.7

Z

15

412

79

536

559

368

-

-

LS

Z (5 mM CaCl₂)

96

407

130

-

-

-

508

641

HS

6.7

XH'

74

409

99

-

-

-

517

638

HS/LS

XH' (5 mM CaCl₂)

12 hours Aggregation

76

408

150

-

-

-

507

640

HS

6.7

XH' 24 hours + 0.4 mM CaCl₂

81

409

103

-

-

-

503

638

HS

XH' (5 mM CaCl₂)

24 hours Aggregation

73

408

163

-

-

-

501

641

HS