Spacer modifcations C3, 9, C12 and 18 are used to insert a spacer arm in an oligonucleotide. These modifications can be added in multiple additions when a longer spacer is required. 3'-Spacer C3 CPG may also act as a blocker of exonuclease and polymerase activity at the 3'-terminus. dSpacer is used to introduce a stable abasic site within an oligonucleotide. See "Photo-Cleavable" modification category for photo-cleavable Spacer.

Modifications for Oligo Synthesis
Product	Catalog No.	50 nmol scale (XX=05)	200 nmol scale (XX=02)	1 mmol scale (XX=01)	2 mmol scale (XX=03)	10 mmol scale (XX=10)	15 mmol scale (XX=15)
Abasic Site (dSpacer abasic furan-THF)	26-6435	$119.00	$119.00	$155.00	$233.00	$1,241.00	$1,551.00
Inverted Abasic Site (dSpacer abasic furan)	26-6448	$200.00	$200.00	$255.00	$321.00	$1,582.00	$1,809.00
rAbasic Site (rSpacer abasic furan)	26-6442	$194.00	$194.00	$253.00	$379.00	$2,022.00	$2,527.00
Spacer 18 (hexaethyleneglycol)	26-6447	$106.00	$106.00	$159.00	$200.00	$810.00	$945.00
Spacer 9	26-6440	$138.00	$138.00	$180.00	$269.00	$1,438.00	$1,797.00
Spacer C12	26-6441	$162.00	$162.00	$216.00	$270.00	$1,728.00	$2,160.00
Spacer C3	26-6439	$106.00	$106.00	$159.00	$200.00	$810.00	$945.00
Spacer C6	26-6945	$122.00	$122.00	$158.00	$237.00	$1,264.00	$1,580.00

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