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Fig. 4 | BMC Cancer

Fig. 4

From: Observation of Zn-photoprotoporphyrin red Autofluorescence in human bronchial cancer using color-fluorescence endoscopy

Fig. 4

Our synthesized Zn-photoprotoporphyrin and photoprotoporphyrin were dissolved in 5% albumin solution and excited with 400-nm light. Fluorescence emitted by synthetic porphyrin derivatives at wavelengths of 587.5, 625.5, and 664.0 nm. We concluded that the 587.5-nm fluorescence was from albumin, the 625.5-nm fluorescence was from Zn-photoprotoporphyrin, and the 664.0-nm fluorescence was from photoprotoporphyrin

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