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Table 2
Carotenoid deficiencies of Synechocystis mutants lacking combinations of crtR, cruF, cruG and crtO
MutantXanthophyll deficiency1Intermediates accumulated
ΔcrtR zeaxanthin, cryptoxanthin2, myxoxanthophyll, 3′-hydroxyechinenone2 3-dehydroxy-myxoxanthophyll 
ΔcruF myxoxanthophyll N/A 
ΔcruG myxoxanthophyll myxol 
ΔcrtO echinenone, 3′-hydroxyechinenone2, canthaxanthin2 N/A 
ΔcrtRcruF zeaxanthin, cryptoxanthin2, myxoxanthophyll, 3′-hydroxyechinenone2 N/A 
ΔcrtRcruG zeaxanthin, cryptoxanthin2, myxoxanthophyll, 3′-hydroxyechinenone2 3-dehydroxy-myxol 
MutantXanthophyll deficiency1Intermediates accumulated
ΔcrtR zeaxanthin, cryptoxanthin2, myxoxanthophyll, 3′-hydroxyechinenone2 3-dehydroxy-myxoxanthophyll 
ΔcruF myxoxanthophyll N/A 
ΔcruG myxoxanthophyll myxol 
ΔcrtO echinenone, 3′-hydroxyechinenone2, canthaxanthin2 N/A 
ΔcrtRcruF zeaxanthin, cryptoxanthin2, myxoxanthophyll, 3′-hydroxyechinenone2 N/A 
ΔcrtRcruG zeaxanthin, cryptoxanthin2, myxoxanthophyll, 3′-hydroxyechinenone2 3-dehydroxy-myxol 
1

The xanthophyll deficiency was the same in the WT, FG/ΔG and HG/ΔG backgrounds;

2

These carotenoids were not detected by RP-HPLC in this study; deficiency is assumed based on literature, as detailed in the text and Supplementary Figure S3.

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