A pre-protein is a form that contains a signal sequence that specifies its insertion into or through membranes. A pro-protein is one that is inactive; the full function is only present when an inhibitory sequence has been removed by proteolysis. A pre-pro-protein has both sequences still present. Pre-pro-proteins usually only accumulate as products of in vitroprotein synthesis.
= September 24 = == excise tax == An excise tax creates inefficiency in that the number of transactions in a market is reduced. Because the tax discourages mutually beneficial transactions, there is _ from a tax. 18.104.22.168 00:24, 24 September 2007 (UTC) == Mexico`s view on Palestine == What was Mexico`s view on Palestine right after WWI? Did .....Found on http://en.wikipedia.org/wiki/Pre-pro-protein
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