Hi everyone,

I need some help on the identification of unexpected bands.

Extraction of plasmidic DNA from pBluescriptII (lane 1,6) and extraction of genomic DNA from Lactobacillus plantarum (lane 4,5).

pBluescriptII ( ~ 3kb) and Lactobacillus ( ~3300 kb)

Regarding plasmidic DNA (lane 1,6) there are two bands. First band could correspond to the supercoiled and the band below could correspond to the circular, single stranded ?

Regarding genomic DNA, there are 2 bands between 1500bp and1000bp that I can´t understand why they appear. Don´t know if working with Lactobacillus is normal to see these 2 bands.

Thanks

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