HPLC elution profiles (obtained by the jegpsu method) of pigments extracted from cells of the wild type (solid line) and the cruG mutant (dotted line) of Synechococcus sp. strain PCC 7002. Peak identities: s, synechoxanthin; mf, myxol-2′ fucoside; mx, myxol; z, zeaxanthin; he, hydroxy-echinenone; z-cis, cis isomer of zeaxanthin; p, plectaniaxanthin; c, cryptoxanthin; e, echinenone; and b, β-carotene.