Chlorophyll a (chl a) could be dissolved into water in the presence of deoxyribonucleic acid (DNA). The electron specrtum of this water-soluble chl a differed from that of chl a in petroleum ether which ccntains 0.5% isopropyl alcohol (PI solution). Fluorescence quanturn yield of water-soluble chl a was O.070 times larger than that of chl a in PI solution.
Chl a in PI solution was completely photobleached by 10 min photoillumination, but water-soluble chl a was not photobleached at all even by 30 min photoillumination.
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