Table 2 Calcium sensors discussed in this review.

18

BAPTA sensor family

0.15; ~0.70^a

Selective

Fluorophore dependent

Cytosolic^d

Stable

ON

¹⁹²

19

–

256^b

Selective

488

–

–

ON

¹⁶¹

20

BCaM

90

Selective

450

Cytosolic^d

Stable

ON

¹⁹³

21

Bichromophore

14.8

Selective

436

–

–

ON

¹⁹⁴

22

Calix[4]arene

121^b

Selective

510

–

–

ON

¹⁶²

23

–

2400

Selective

550

8.1

–

ON

¹⁶³

24

PIAQ–AC 5a

0.309^b

Not selective

515

–

–

ON

¹⁶⁴

25

PIAQ–AC 5b

0.069^b

Not selective

515

–

–

ON

¹⁶⁴

26

–

0.0192

485^c

–

–

¹⁶⁵

27

DMK

0.0144

Selective

390

4

–

ON

¹⁹⁵

28

ISB

LOD = 0.3

Selective

483

7.2

–

ON

¹⁶⁶

29

MPFCP-1

0.44

Selective

525

Cytosolic^d

Stable

ON

¹⁶⁷

30

MPFCP-2

1.21

Selective

525

Cytosolic^d

Stable

ON

¹⁶⁷

31

BODIPY-BAPTA

0.501^b

Selective

508

7.2

Stable

ON

¹⁶⁸

32

JF₅₄₉-BAPTA

0.31

Selective

569

Cytosolic^d

Stable

ON

¹⁶⁹

33

CaSIR-1

0.58

Selective

>650

Cytosolic^d

Stable

ON

¹⁷⁰

34

–

5120

Selective

655

–

–

OFF

¹⁷¹

35

Di-Aza-crown-cNDI

0.11^b

Selective against Mg²⁺ and Na⁺

655

–

–

ON

¹⁷²

36

CaRB

1.22

Selective

631

7.2

7.2

ON

¹⁷³

37

Calix[4]arene-BDP

–

Selective against Mg²⁺

507

–

–

OFF

¹⁸⁰