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Extracted positive ion MALDI images of the [M+Na]+ of PC40:6 (m/z 856.7 amu) (A) and PC44:12 (m/z 900.6 amu) (B). Merged positive ion MALDI images of PC40:6 (red, total photoreceptor layer) and PC44:12 (green, photoreceptor outer segments) (C).
