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  1. Genetic differences in human circadian clock genes among worldwide populations. Ciarleglio CM, Ryckman KK, Servick SV, Hida A, Robbins S, Wells N, Hicks J, Larson SA, Wiedermann JP, Carver K, Hamilton N, Kidd KK, Kidd JR, Smith JR, Friedlaender J, McMahon DG, Williams SM, Summar ML, Johnson CH (2008) J Biol Rhythms 23(4): 330-40
    › Primary publication · 18663240 (PubMed) · PMC2579796 (PubMed Central)
  2. A cyanobacterial circadian clockwork. Johnson CH, Mori T, Xu Y (2008) Curr Biol 18(17): R816-R825
    › Primary publication · 18786387 (PubMed) · PMC2585598 (PubMed Central)
  3. Imaging protein interactions with bioluminescence resonance energy transfer (BRET) in plant and mammalian cells and tissues. Xu X, Soutto M, Xie Q, Servick S, Subramanian C, von Arnim AG, Johnson CH (2007) Proc Natl Acad Sci U S A 104(24): 10264-9
    › Primary publication · 17551013 (PubMed) · PMC1891211 (PubMed Central)
  4. Elucidating the ticking of an in vitro circadian clockwork. Mori T, Williams DR, Byrne MO, Qin X, Egli M, Mchaourab HS, Stewart PL, Johnson CH (2007) PLoS Biol 5(4): e93
    › Primary publication · 17388688 (PubMed) · PMC1831719 (PubMed Central)
  5. Distinct light and clock modulation of cytosolic free Ca2+ oscillations and rhythmic CHLOROPHYLL A/B BINDING PROTEIN2 promoter activity in Arabidopsis. Xu X, Hotta CT, Dodd AN, Love J, Sharrock R, Lee YW, Xie Q, Johnson CH, Webb AA (2007) Plant Cell 19(11): 3474-90
    › Primary publication · 17982000 (PubMed) · PMC2174886 (PubMed Central)
  6. Cycling of CRYPTOCHROME proteins is not necessary for circadian-clock function in mammalian fibroblasts. Fan Y, Hida A, Anderson DA, Izumo M, Johnson CH (2007) Curr Biol 17(13): 1091-100
    › Primary publication · 17583506 (PubMed) · PMC3434691 (PubMed Central)
  7. Circadian rhythms of superhelical status of DNA in cyanobacteria. Woelfle MA, Xu Y, Qin X, Johnson CH (2007) Proc Natl Acad Sci U S A 104(47): 18819-24
    › Primary publication · 18000054 (PubMed) · PMC2141860 (PubMed Central)
  8. Bacterial circadian programs. Johnson CH (2007) Cold Spring Harb Symp Quant Biol : 395-404
    › Primary publication · 18419297 (PubMed)
  9. Quantitative analyses of circadian gene expression in mammalian cell cultures. Izumo M, Sato TR, Straume M, Johnson CH (2006) PLoS Comput Biol 2(10): e136
    › Primary publication · 17040123 (PubMed) · PMC1599765 (PubMed Central)
  10. No promoter left behind: global circadian gene expression in cyanobacteria. Woelfle MA, Johnson CH (2006) J Biol Rhythms 21(6): 419-31
    › Primary publication · 17107933 (PubMed) · PMC3431602 (PubMed Central)