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. 2021 Sep 14;120(21):4891–4902. doi: 10.1016/j.bpj.2021.09.016

Table 2.

Values for the parameters describing Tim protein binding to PS-containing vesicles

Binding parameter Tim1 Tim3 Tim4
Hill coefficient, h 1.38 (1.2, 1.57) 1.65 (1.59, 1.72) 2.28 (2.17, 2.39)
K for Tim-Ca2+-PS dissociation, μM 61 (59, 63) 127 (120, 136) 35 (34, 36)
KTC for Tim-Ca2+ dissociation, μM 590 (540, 650) 4300 (3600, 5200) 136 (123, 150)
KTS for Tim-PS dissociation, μM 1800 (1300, 2700) >5000 239 (220, 258)

Values for Tim3 were obtained by fitting the data in Fig. 4, b and c to Eq. S4. Values for Tim1 and Tim4 were obtained by fitting the data in Figs. S3 and S4 to Eq. 2, utilizing h-values recalculated from the primary data for Figure 5 of Tietjen et al. (14). Brackets give 95% confidence intervals. The values for each parameter are significantly different for the three Tim proteins at >95% confidence as calculated using a z test.

The previously obtained values for the Hill coefficients of Tim1 and Tim4 were recalculated after reanalysis of the primary data using the updated data analysis methodology of this work; see Supporting materials and methods.