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A spectral method to investigate the effect of Fe3+, Fe2+ on the thermostability ofphycocyanin (PC) of Spirulina maxima showed that iron ions prevent decrease of visible light absorbanceand fluorescence intensity of PC. Increase in denaturation temperature caused by Fe3+ was observed bythe micro - differential scanning calorimetric method. All results showed iron ions maintain the aggrega-tion stability of the PC. The absorption spectrum of phycocyanobilin (PCB, a prosthetic group of PC) withFe3+ in chloroform was quite different from that of free PCB.
A spectral method to investigate the effect of Fe3 +, Fe2 + on the thermostability ofphycocyanin (PC) of Spirulina maxima showed that iron ions prevent decrease of visible light absorbance and fluorescence intensity of PC. Increase in denaturation temperature caused by Fe3 + was observed bythe micro - differential scanning All results showed iron ions maintain the aggrega- tion stability of the PC. The absorption spectrum of phycocyanobilin (PCB, a prosthetic group of PC) with Fe3 + in chloroform was quite different from that of free PCB.