Sarna may refer to:

Sarna (Polish surname)
Sarna (Punjabi surname)
Sarna (clan), a Punjabi clan of India
Sarna, Warmian-Masurian Voivodeship, a village in northern Poland
Särna, a locality in Dalarna County, Sweden
SaRNA, small activating RNA
Sarna sthal – place of worship
Sarna (drug), a drug
Sarna (religion)

See also
All pages with titles containing Sarna
Sarnaism, the religious beliefs held by tribes in the state of Jharkhand, India, and other central Indian states
Srna (disambiguation)Sarna.net ("Sarna" for short) is the fan wiki project for the fictional BattleTech universe, named after the equally fictional star system therein.
These duplications allow for the pancreatic amylase AMY2 to re-target to the salivary glands, allowing animals to detect starch by taste and to digest starch more efficiently and in higher quantities. This has happened independently in mice, rats, dogs, pigs, and most importantly, humans after the agricultural revolution.Following the agricultural revolution 12,000 years ago, human diet began to shift more to plant and animal domestication in place of hunting and gathering. Starch has become a staple of the human diet. Despite the obvious benefits, early humans did not possess salivary amylase, a trend that is also seen in evolutionary relatives of the human, such as chimpanzees and bonobos, who possess either one or no copies of the gene responsible for producing salivary amylase.Like in other mammals, the pancreatic alpha-amylase AMY2 was duplicated multiple times. One event allowed it to evolve salivary specificity, leading to the production of amylase in the saliva (named in humans as AMY1). The 1p21.1 region of human chromosome 1 contains many copies of these genes, variously named AMY1A, AMY1B, AMY1C, AMY2A, AMY2B, and so on.However, not all humans possess the same number of copies of the AMY1 gene. Populations known to rely more on saccharides have a higher number of AMY1 copies than human populations that, by comparison, consume little starch.