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Escherichia coli
4
Kinetics
Mutation
Putrescine
Ribosomes
4
auxotrophic mutant
4
escherichia coli
4
in vitro study
4
protein synthesis
4
putrescine
4
spermidine
4
Amino Acid Activation
2
Bacterial Proteins
2
Cell Fractionation
2
Cell-Free System
2
Centrifugation, Density Gradient
2
Magnesium
2
Peptide Chain Elongation
2
Peptide Chain Initiation
2
Peptide Chain Termination
2
Phenylalanine
2
RNA, Transfer, Amino Acyl
2
Support, Non-U.S. Gov't
2
Time Factors
2
animal experiment
2
heredity
2
microorganism
2
phenylalanine c 14
2
polyamine
2
protein
2
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1
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2
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3
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4