Figure 2.
Ca2+ titration curves for cTnI(167CAEDANS)-cTnC(89CDDPM) or cTnI(151CAEDANS)-cTnC(89CDDPM) labeled thin filaments containing either wild type or mutant cTnT. The normalized FRET efficiency increases as AEDANS and DDPM are brought into closer proximity upon addition of gradually increasing levels of Ca2+.