Im guessing it is due to gene shuffling
Peptones and beef extract
MacConkey agar is a selective and differential culture medium for bacteria designed for isolation of Gram negative and usually enteric bacilli, based on their ability to ferment lactose. It contains bile salts, crystal violet, neutral red dye. There are many variations of MacConkey agar depending on the need. This medium was developed by Alfred Theodore MacConkey. This agar can distinguish gram negative bacterias that can ferment. This is known as the indicator medium.
<span>Genomic libraries can be constructed using phages. A phage, also called bacteriophage, is a virus which effects bacteria. There are more phages than any other organism in the world. Phages can be used for treatment of infections of the bacterial type.</span>
