Every item is shipped based on the best shipping method assessed for the temperature requirements of that specific item. Items are grouped and shipped together whenever
possible, and a separate shipping charge will be included for each shipping method required. Shipping charges listed below are from our US warehouses to the Contiguous US,
Alaska, Hawaii, Canada and Puerto Rico. Shipping charges for countries outside the US and Canada will be determined once order has been received
Please note: We can not ship to PO boxes
Express Blue Ice
Express Dry Ice
Animal Health Prescription Item
SHIPPING METHODS & CHARGES
Ships via FedEx Ground to Contiguous US, Alaska, Canada, Monday through Friday. This method is used for less temperature sensitive items such as lab ware and animal
health products, bulky and/or heavy items
Labware ships FedEx Ground free of charge to the contiguous US
RNA polymerase transcribes DNA to synthesize RNA using the four ribonucleoside triphosphates as substrates. In prokaryotes, a catalytic core known as RNAP is formed from α, β and σ RNA pol subunits that, once complexed, can initiate transcription. RNA pol σ fecI is a 173 amino acid protein that belongs to the extracytoplasmic function subfamily of the E. coli sigma-70 factor family of peptides. Sigma factors function as initiation factors that work together to promote the attachment of RNA polymerase to target initiation sites. RNA pol σ fecI has been demonstrated to specifically direct transcription of fec transport genes important in cellular regulation of ferric citrate.
For Research Use Only. Not Intended for Diagnostic or Therapeutic Use.