Dharmacon is able to accommodate a wide variety of 5' and 3' modifications on either the sense or antisense strands of siRNA duplexes. Please use the drop-down menus on either side of the Target Sequence box to select the desired modification.
**Please note: Default overhang composition for siRNAs is now UU. If you would like to order siRNAs with dTdT overhangs, please select that option from the Overhangs drop-down menu below.