TABLE 1.

Relative abundance of zeaxanthin and β-carotene in whole cells and purified PSII

Molar ratios of pigments were calculated by integration of an area underneath the relevant peak and using extinction coefficients, as described under “Materials and Methods.” S.D. values were calculated from two independent measurements (n = 2).

Source	Zea/Chla	Zea/β-carotene	β-Carotene/Chla
PSII	0.275 ± 0.033	2.140 ± 0.270	0.131 ± 0.015
Intact cells	0.880 ± 0.033	4.230 ± 0.180	0.210 ± 0.007