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)
dSpacer (abasic furan)	26-6435	$150.00	$150.00	$200.00	$350.00	Inquire	Inquire

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