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(a) A 36-spot ECL array not exposed to procarcinogenic material showing the spot-to-spot consistency generated from each location on the PG block. Conditions: 10 mM sodium acetate, 0.15 M NaCl, pH 5.5, +1.25 V; 20 s. (b) A column chart showing the relative ECL intensity to spot A3 (upper right corner) from each 4-unit spot location on the PG block.
