References:

• Souslova EA, Belousov VV, Lock J, Stromblad S, Kasparov S, Bolshakov AP, Pinelis VG, Labas YA, Lukyanov S, Mayr LM, Chudakov DM. Single fluorescent protein-based Ca²⁺ sensors with increased dynamic range. BMC Biotechnol. 2007; 7 :37. / pmid: 17603870