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The core of Fig 2 groups together photosynthetic pigments, with Chl a and its epimer, ββ-Car and Zea. Two other pigments included are Car55, which has an elution very close to ββ-Car, and Car36. Car36 is a key ancillary pigment binding Rhodophyta and Glaucophyta. Presence of these pigments in oceanographic analyses can indicate the presence of the corresponding phyla.
