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  5. Do unlabeled primers have a 3' phosphate?

FAQ

Do unlabeled primers have a 3' phosphate?

Unless otherwise requested at the time of the order, unlabeled primers are synthesized with free hydroxyls at both the 5' and 3' ends. Terminal phosphate modifications are available as custom modifications only.

For a list of available modifications and associated pricing, please visit our Oligo Modifications webpage or contact our Customer Service team.