CGSC Strain#: 5461
Strain Designation: HB94      Source of Strain: H. Boyer
Sex: Hfr    Point of Origin#: 1   Map Position: 96.80   Direction of Marker Transfer: Clockwise
Chromosomal Markers: gal-55, λ^-, relA1, spoT1, thiE1, hsdR4
Strain Comments:

• N.B. We have two reports that this strain is immune to phage λ; that it does not adsorb λ.
• This strain is r^-, m_K⁺. The mutation hsdR4 is called ramA7 in the reference below.
• spoT1-- In addition to the 6bp insertion, there is a C to T transition resulting in an H257Y substitution.
• thiE1 was formerly called thi-1

References:

• Boyer, HW, D Roulland-Dussoix 1969. A complementation analysis of the restriction and modification of DNA in Escherichia coli. J. Mol. Biol. 41(3):459-72.