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Tetrapyrrolic chlorophyll catabolites in senescent higher plants.4,5 Chlorophylls [Chl a (R = CH3) or Chl b (R = CH=O)] are degraded via pheophorbide a (Pheo a), the “red” chlorophyll catabolite (RCC) and primary “fluorescent” chlorophyll catabolites (pFCCs) to “nonfluorescent” chlorophyll catabolites (NCCs, such as Hv-NCC-1, 1).
