I am cloning in BL21 and ive got these colonies. Before the weekend the big colonies were different and smoother edges. But after 2 days in +4⁰C they look like in pictures. I thought the smaller ones were satellites, but now i think that it is just contamination... Becaise the edges are not smooth and are overlaping with the edges of smaller colonies.

Today i put both colonies on selective agar again.

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