Figure 4. Extended Time of PS-I Stability on Dried Surface.

Fluorescence spectrum of a PS-I film containing 0.5% A₆K was monitored for 3 wk. Negligible increase in fluorescence was observed at approximately 683 nm. A blueshift from approximately 735 nm to approximately 727 nm fluorescence was observed. Thus, it suggests that the PS-I complex retained most of its structural integrity under conditions examined. Such shifts have been noted under other conditions.