(Q48403509)
Statements
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Amplification and modification of dihydrofolate reductase in Escherichia coli. Nucleotide sequence of fol genes from mutationally altered plasmids (English)
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Smith DR
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Rood JI
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Bird PI
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Sneddon MK
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Calvo JM
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Morrison JF
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1 August 1982
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257
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15
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9043-9048
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