Cheuk Hung Lee, MBBS (HK), FHKAM (MED), FHKCP, MScPD (Cardiff), MRCP (UK), DPD (Wales), DipDerm (Glasgow), PGDipClinDerm (London), GradDipDerm (NUS), DipMed (CUHK), Kar Wai Alvin MBChB DCH (Sydney), Dip Derm MScClinDerm Kwin Wah Chan, PgDipPD (Lond), (Sydney). J Cosmet Med 2023;7:38-41. https://doi.org/10.25056/JCM.2023.7.1.38

We use confocal fluorescence microscopy and fluorescence recovery after photobleaching to show that a specific light signal controls the diffusion of a protein complex in thylakoid membranes of the cyanobacterium Synechococcus sp PCC7942 in vivo. In low light, photosystem II appears completely immobile in the membrane. However, exposure to intense red light triggers rapid diffusion of up to app...