how many promoters be used - the number of promoters that in use (Jul/14/2005 )

hi ,who can tell me as to now ,how many promoters are founded by scientists,and how many are patental,and how many are already be carried out for use?

Please have a look at this paper which answers exactly the question you are asking.

A high-resolution map of active promoters in the human genome
http://www.ncbi.nlm.nih.gov/entrez/query.f...8478&query_hl=2