Brain produces proteins which gives some sensitive nerve reactions in the brain itself. The FASEB Journal says that Scientists of US and Brazil have discovered this by pulling out some peptides, small proteins from the brains of the mice and ascertained the order of amino acids. This extraction was later examined with the already known peptide which got attach to the brain but does not react to the receptor affected by Marijuana, Whereas the new extraction lead to drugs not only bound to but also positively reacted to the receptors. The scientists of Mount Sinai School of Medicine, New York also confirm that the side effects of these drugs are very limited.