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. 2018 Mar 19;115(14):3722–3727. doi: 10.1073/pnas.1720574115

Table 1.

Estimated pH-inducible quenching in vivo

Average fluorescence lifetime (τave), ns
Strain name At pH 7.5 At pH 5.5 pH-inducible quenching, % NPQcalc
∆PSI 2.21 ± 0.22 1.19 ± 0.04 45.8 ± 0.05 0.85 ± 0.18
∆PSII 2.29 ± 0.15 0.60 ± 0.08 73.9 ± 0.02 2.84 ± 0.27
∆PSI/II 2.39 ± 0.13 1.17 ± 0.05 50.8 ± 0.03 1.04 ± 0.12

The efficiency of pH-inducible energy quenching was calculated as 1 − τave (pH 5.5)/τave (pH 7.5) (%). NPQcalc = τave (pH 7.5)/τave (pH 5.5) − 1; n = 3 biological replicates, mean ± SE.