>tr|Q8PV56|Q8PV56_METMA PEP-CTERM sorting domain-containing protein OS
+=Methanosarcina mazei (strain ATCC BAA-159 / DSM 3647 / Goe1 / Go1 / 
+JCM 11833 / OCM 88) OX=192952 GN=MM_2118 PE=4 SV=1

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You know the Q8PV56 part is already a unique UniProt identifier, right? UniProt calls it an 'Accession Number'. There would seem to be no need to use the whole line as a key.

Here is the info in case you want to excise the accession number with a regular expression: accession_numbers

There can exist also multiple isoforms, which have similar accession numbers but postfixed with dash+integer, like so: P68250-3

In reply to Re: Potential hash key ids limitations by erix
in thread Potential hash key ids limitations by Anonymous Monk

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