presequence

== English == === Etymology === From pre- +‎ sequence. === Noun === presequence (plural presequences) (linguistics) The opening part of a conversation. (biochemistry) A sequence of amino acids in a preprotein; the sequence of amino acids at the N-terminal end of a protein === Verb === presequence (third-person singular simple present presequences, present participle presequencing, simple past and past participle presequenced) To sequence in advance of another operation