CGSC Strain#: 1020
Strain Designation: AB1020      Source of Strain: T. Ramakrishnan & Adelberg
Sex: F' Episome/Plasmid: F14-6
   Plasmid Markers/Mutations: ilvO-266
   Plasmid Comment: carries {\it ilvE266} mutation.
Chromosomal Markers: fhuA2, lacY1 or lacZ4, tsx-4, glnV44(AS), gal-6, λ^-, hisG1(Fs), rpsL8 or rplL9(L?) or rpsL17, malT1(λ^R), xyl-7, mtlA2, metB1, ΔargH1, thiE1
Strain Comments:

• This strain is valine-resistant but is very unstable and segregates out valine-sensitive clones in nutrient broth.
• glnV44(AS) was formerly called supE44
• glnV44(AS) was formerly called su⁺_II
• thiE1 was formerly called thi-1
• xyl-7 was formerly called xylA7
• = strep-resistant
• AS = amber(UAG) suppressor
• Fs = Frameshift mutation
• LamR = Lambda-resistant

References:

• Ramakrishnan, T., E.A. Adelberg 1965. Regulatory mechanisms in the biosynthesis of isoleucine and valine. II. Identification of two operator genes. J.Bacteriol. 89:654-660