Peptide synthesis and sequencing explained

What is peptide synthesis?

Chemical peptide synthesis assembles a chosen amino-acid sequence. In solid-phase synthesis, a growing chain is attached to a support during repeated chemical steps. The intended sequence is a design specification; it is not, by itself, an analytical result for the finished material.

Merrifield's account of solid-phase synthesis describes the development of this approach. This guide explains the terminology and does not describe a custom-synthesis service offered by Zynx.

Sources: Concept and early development of solid-phase peptide synthesis

What is peptide sequencing?

Peptide sequencing determines or infers the order of amino-acid residues. Tandem mass spectrometry examines fragment ions to obtain sequence information. Interpretation depends on the observed fragments and the method used; incomplete fragmentation can leave gaps.

A study combining collision-induced dissociation with electron transfer dissociation demonstrated how complementary fragmentation can improve sequence coverage. A mass measurement alone should not be presented as a complete sequence determination.

Sources: De novo peptide sequencing by tandem MS using complementary CID and electron transfer dissociation

What should a research-material record explain?

Keep the stated compound identity, intended sequence and actual test results separate. When a report is available, check its sample identifier, laboratory, date, method and reported result. Ask what was tested rather than assuming that every possible quality attribute was measured.

Zynx's quality page lists documents only where a file is held. A published paper about synthesis or sequencing does not certify a Zynx batch. Contact us about the documentation for a particular catalogue entry.