1. Ai, H.W., Hazelwood, K.L., Davidson, M.W., and Campbell, R.E. 2008. Fluorescent protein FRET pairs for ratiometric imaging of dual biosensors. Nat. Methods, 5: 401–403.
2. Albeck, J.G., Mills, G.B., and Brugge, J.S. 2013. Frequency-Modulated Pulses of ERK Activity Transmit Quantitative Proliferation Signals. Mol. Cell, 46: 162–172.
3. Allen, G.J., Kwak, J.M., Chu, S.P., Llopis, J., Tsien, R.Y., Harper, J.F., and Schroeder, J.I. 1999. Cameleon calcium indicator reports cytoplasmic calcium dynamics in Arabidopsis guard cells. Plant J., 19: 735–747.
4. Aoki, K. and Matsuda, M. 2009. Visualization of small GTPase activity with fluorescence resonance energy transfer-based biosensors. Nat. Protoc., 4: 1623–1631.
5. Aoki, K., Komatsu, N., Hirata, E., Kamioka, Y., and Matsuda, M. 2012. Stable expression of FRET biosensors: a new light in cancer research. Cancer Sci., 103: 614–619.