What is cry protein?

Cry protein:

Cry protein means crystal protein.

Cry protein producer:

There are many types of it a bacterium called bacillus thuringiensis produces it.

Cry protein benefits:

A gene named cry gene is responsible for its production of a toxic substance which kills a wide  variety of insects. Throw genetic engineering this cry gene is inserted in the plant body which in turn develops ability to defend itself from the attack of the pest. A good number of crops have been developed having this property. BT cotton, BT corn, BT brinjal are some such crops. Such crops need not be protected with the help of pesticides.