In the absence of lactose, the repressor protein encoded by the I gene binds to the lac operator and prevents transcription. Binding of allolactose to the repressor causes it to leave the operator. This enables RNA polymerase to transcribe the three genes of the operon.
A tough-skinned tropical fruit, the mango features a sweet, orange- to red-color flesh inside when ripe. Kensington pride, Kent, Palmer and sensation are only a few of the many varieties of mango available through groceries and markets.
The Vine Peach or Mango Melon is a drought-tolerant, Native-American annual whose fruits are peach-sized and colored, and mango-like in flavor and texture. While tasty raw, they excel canned or cooked into pies, preserves, conserves and pickles (for pickles, pick while still green).