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.
If you do, the flesh will start to turn dark brown inside and you will offset the flavor; this is commonly known as chilling injury. The typical shelf life for a mango is 7-14 days, on average, but this can vary greatly, depending on storage, handling and degree of ripeness at the time of harvest.