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Spectrum 1 labeled TMPyP4 is for the free porphyrin (in the absence of DNA). Spectrum 2 is for TMPyP4 in the (TMPyP4)2 · 39-mer Bcl-2 complex. Spectrum 3 is for TMPyP4 in the (TMPyP4)4 · 39-mer Bcl-2 complex.
