Scheme.
Outline of the Main Path of Chlorophyll Breakdown in Higher Plants, Including Structural Formulae of Chlorophylls a and b, of the Primary Fluorescent Chlorophyll Catabolite (pFCC), of Non-fluorescent Chlorophyll Catabolites (NCCs), and of Yellow Chlorophyll Catabolites (YCCs; with general formulae for NCCs and YCCs, see Table 1 for specific constitutional formulae of individual NCCs). Atom numbering used for chlorophylls according to IUPAC (see, e.g., 1)