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.
They must be fully ripen before eating, or youâll get a bland taste. Keep unripe mango at room temperature, it will turn soft and sweet in a few days. If you want to speed up the process you can place your mango in a paper bag, still at room temperature. Once your mango is ripen, place it in the fridge.Whole mangoes can last up to 5 days. You can keep peeled and cubed mangoes in an airtight container in the refrigerator for a few days, and up to 6 months in the freezer.Recipes using mangoes.hey must be fully ripen before eating, or youâll get a bland taste. Keep unripe mango at room temperature, it will turn soft and sweet in a few days. If you want to speed up the process you can place your mango in a paper bag, still at room temperature. Once your mango is ripen, place it in the fridge.