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(A) L1 indicates mRNA extracted from 10 lung cancer tissues and mixed in equal amounts; (B) radiographic autoradiographs of the first and second strands of cDNAs after alkaline agarose gel electrophoresis; (C) radiographic autoradiographs of cDNA fragments separated chromatographically and collected by Sepharose CL-2B gel column after non-denaturing polyacrylamide gel electrophoresis.
