CGSC Strain#: 5820
Strain Designation: JBK239      Source of Strain: J.B. Kirschbaum
Other Designations: X239
Sex: F- Chromosomal Markers: lacY1, glnX44(AS), gal-6, λ^-, hisG1, mgl-2, xyl-7, mtlA2, metB1, ΔargH1, btuB51, rplL9(L?), thiE1, purD62
Strain Comments:

• glnX44(AS)-- Mutation is a C to T transition at nucleotide 34 (3rd position of the anticodon)
• hisG1-- This mutation has been reported as either a frameshift or a 36 nt deletion
• glnX44(AS) was formerly called su⁺_II
• glnX44(AS) was formerly called supE44
• glnX44(AS) was formerly called glnV44
• thiE1 was formerly called thi-1
• xyl-7 was formerly called xylA7
• AS = amber(UAG) suppressor
• L? = assignment uncertain

References:

• Kirschbaum, JB, IV Claeys, S Nasi, B Molholt, JH Miller 1975. Temperature-sensitive RNA polymerase mutants with altered subunit synthesis and degradation. Proc. Natl. Acad. Sci. U.S.A. 72(6):2375-9.