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Answer Posted / shahzad a pandith
On agar plates, ampicillin degradation can lead to the formation of satellite colonies on transformation plates. Satellite colonies are very small colonies of cells that have not taken up the plasmid that form around a large colony that has taken up the bla-containing plasmid. The satellites form because the beta-lactamase released by the bla-expressing colony degrades the ampicillin in the vicinity of the colony. The satellites are not necessarily a problem as they will not grow when transferred to a medium containing fresh ampicillin. Good Luck.
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