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we talked about an experiment in which proteins were extracted from bacteria transformed with the pglo plasmid and run on a gel. the results are shown in the accompanying figure. the lanes are as follows: lane 1: molecular weight markers; lane 2: no heat; no arabinose; lane 3: no heat; with arabinose; lane 4: with heat; no arabinose; lane 5: with heat; with arabinose. on the gel, why was there a glowing green band in lane 3?