Escherichia Coli K12 Strain - Live

Escherichia coli bacteria K12 strain - Live

Cultures are supplied labelled, on agar slopes in screw top vials, and identified as being gram positive (+ve) or negative (-ve). As a general rule Gm⁺ are not resistant to penicillin but Gm^- are.

All bacteria cultures supplied have been selected for school use and checked for purity before dispatch by the producer. Although considered to be non-pathogenic, the possibility exists of mutation, accidental contamination, or over-sensitivity of an individual to a particular organism. It is therefore important that all cultures are viewed as being potentially dangerous and are handled and treated accordingly.

Escherichia coli is a Gram -ve, rod-shaped bacterium of the genus Escherichia that is commonly found in the lower intestine of warm-blooded organisms.

It is facultatively (optionally) anaerobic, meaning it can switch between anaerobic and aerobic respiration depending on conditions.

This is a Lac+ (lactose fermenting) culture.

Storage and shelf life

Shelf life approx 3-4 weeks @4°C

To keep for longer you will need to subculture the bacteria onto new agar slopes.

What is the difference between E. Coli K12 Strain and E. Coli B Strain?

K12 is not susceptible to T4 bacteriaphage where as B strain is.

K12 is a motile bacteria, posessing flagella, B strain is not motile.

K12 is generally the most used strain for basic molecular and microbiological teaching and models, B strain is generally used for protein production in industry.

 

Shipped from our Manchester, UK Facility

Orders are securely packed and dispatched from our Manchester warehouse.