Frequently asked questions

Our Scientific Applications Support team has assembled a list of frequently asked questions to help you find answers quickly. Filter using one or more categories to focus on specific topics, or use the search bar to perform a text search.

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What is the length of the TEG spacer in your Biotin-TEG modification, and do you offer a longer spacer arm than TEG?

Unlike the commonly employed carbon spacer arm in many modifications, the Biotin-TEG uses a 15 atom tetraethylene glycol spacer arm, hence the name TEG. If you need a longer spacer arm, you can order a 5' or 3' biotinylated oligo with up to three Spacer 18 (18 atom hexaethylene glycol spacer) modifications between the biotin modification and the oligo sequence.

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