HER Number
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Name Morphotype
σ (sigma) B1 (Siphophage)
Order Family Genus Species
Other designations

Electron Micrograph
Magnification: 297,000X
Bar: 50 nm
Staining: UA
Restriction profile

Characteristics Complete genome sequence
Clear plaques of 0.5mm
Buoyant density in CsCl = 1.515g/mL

Propagation conditions
Host strain HER
Temp. Medium Aerobic/Anaerobic Agitation Others
30ºC TSA

Original reference
Von Lohr, R. 1970. Z. Allg. Mikrobiol. 10:269-274. (En allemand/In deutsch)

Adsorbs poorly, forms small, irregular, turbid plaques from which lysogens can be isolated. Prophage is not UV-inducible.
Pre-adsorption to the indicator bacterium is recommended for plating.
Spontaneous clear-plaque mutants are very frequent (10^-4) and should be used for preparing high titer lysates.
The phage is able to multiply on S. marcescens CV(?).

Received from Date
Dr R.W. Kaplan
Institut für Mikrobiologie
Frankfurt, Germany
Received from Date
Dr F.W. Pons
Institut für Mikrobiologie
Johann Wolfgang Goethe-Universitat
Theodor-Stern-Kai 7, Haus 75A
D-6000 Frankfurt am Main, Germany
Isolé par Date
Dr R.W. Kaplan 1960
Original source
Supernatant of an overnight culture of a lost strain : S. marcescens ES

Last update
GREB, Pavillon de Médecine Dentaire
Université Laval, QC, Canada, G1V 0A6
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