title: Photoreduction of plastoquinone to plastosemiquinone in spinach chloroplasts at -40 degrees C.
mesh_terms: D002734:Chlorophyll / Q000378:metabolism; D002736:Chloroplasts / Q000378:metabolism*; D003624:Darkness; D005615:Freezing; D007700:Kinetics; D008027:Light; D010785:Photophosphorylation; D010944:Plants; D011809:Quinones / Q000378:metabolism*; D013050:Spectrometry, Fluorescence; D013053:Spectrophotometry; D013056:Spectrophotometry, Ultraviolet; D013997:Time Factors
chemical_list: D011809:Quinones; D002734:Chlorophyll