CGSC Strain#: 4471
Strain Designation: W3107      Source of Strain: M.L. Morse
Sex: F- Chromosomal Markers: galT1, λ^-, IN(rrnD-rrnE)1, rph-1
Strain Comments:

• This is the standard gal₇ of Morse.
• IN(rrnD-rrnE)1-- Inverts the region between rrnD (73.74 min) and rrnE (90.66 min)
• rph-1-- is a 1 bp deletion that results in frameshift over last 15 codons and has polar effect on pyrE leading to suboptimal pyrimidine levels on minimal medium.(Jensen 1993 JBact.175:3401)

References:

• Morse, ML, EM Lederberg, J Lederberg 1956. Transduction in Escherichia Coli K-12. Genetics 41(1):142-56.