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Gene-specific PCR for some tested candidate genes by reverse transcription-polymerase chain reaction. RT-PCR results: lane 1: sclera; lane 2: cornea; lane 3: optic nerve; lane 4: retina; lane 5: lung; lane 6: skeletal muscle; lane 7: heart; lane 8: trachea; lane 9: kidney (all Clontech, Inc., Temecula, CA); lane 10: brain (Ambion); lane 11: cRNA; lane 12: no RT (H2O).
