Planning a Peptide Supply Request

The four inputs — Sequence or catalogue reference, target purity, quantity and destination. These four determine whether a quotation can be prepared directly or whether a feasibility review is needed first.

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Sequence or catalogue reference — A catalogue reference is unambiguous. Where the requirement is a sequence, state it with modifications, since a product name frequently maps to more than one structure. If the sequence is proprietary, agree confidentiality terms before disclosure.

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Target purity — State the purity as an area percentage and name the method, typically reverse-phase HPLC. Where the analytical requirement is contractual, state the column and gradient as well so that a comparable result can be reproduced independently.

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Quantity — State the total quantity and the packing preference. This is the field most often left unstated, and it is the one that most often causes a filling change after the order is confirmed.

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Destination — Destination country determines the shipping regime, the documentation requirements and the reasonable transit expectations. Buyers should confirm the import requirements that apply to them, since these differ substantially between jurisdictions.

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What happens next — A written quotation returns with specification, documentation package, lead time, shipping terms and a validity period. Where the four inputs above are complete, this normally requires no clarification round.

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