Fig. 2.

Abundance profiles of key clock proteins. A, changes in the abundance of the central clock mechanism proteins in light/dark conditions (LD) across 48 h. The protein expression profiles obtained here seem to agree with previously published work (10, 41). KaiA's profile is represented in blue, KaiB's profile is in red, and KaiC's profile in green. B, comparison of the abundance profile of the transcriptional regulator, PadR family (Pex), obtained in this work via quantitative LC-MS/MS and across 48 h in LD (top profile), with the previously published profile obtained via Western blotting and across 24 h in LD (bottom profile adapted from Ref. 42). Both protein abundance profiles show an increase in abundance during the dark period. Gray areas represent the dark period, and white areas represent the light period.