Sorry about my previous question I meant, Does any one know a good price on a crossbow.

Explanation:

A crossbow is a ranged weapon using an elastic launching device similar to a bow; it consists of a bow-like assembly called a prod, mounted horizontally on a main frame called a tiller, which is hand-held in a similar fashion to the stock of a long gun. Crossbows shoot arrow-like projectiles called bolts or quarrels. A person who shoots crossbow is called a crossbowman or an arbalist (after the arbalest, a European crossbow variant used during the 12th century).

this protocol provides a detailed procedure for agarose-based ip to purify and enrich the protein of interest.