L-ARABINOSE NEGATIVE MUTANTS OF THE L-RIBULOKINASE STRUCTURAL GENE AFFECTING THE LEVELS OF L-ARABINOSE ISOMERASE IN ESCHERICHIA COLI

L-ARABINOSE NEGATIVE MUTANTS OF THE L-RIBULOKINASE STRUCTURAL GENE AFFECTING THE LEVELS OF L-ARABINOSE ISOMERASE IN ESCHERICHIA COLI