"@@who defines Pfam id syntax?"^^ . "relates a Pfam feature to its identifier, e.g. PFPF00993"^^ . "Pfam id"^^ . "see also $nc/packages/pdb/sifts_tpl.py"^^ . "see also SIFTS design notes in $nc/packages/pdb/sifts.doctest"^^ . . . .