lib/bio/db/pdb/chain.rb in bio-1.2.1 vs lib/bio/db/pdb/chain.rb in bio-1.3.0

@@ -4,11 +4,11 @@
 # Copyright:: Copyright (C) 2004, 2006
 #             Alex Gutteridge <[e-mail]>
 #             Naohisa Goto <[e-mail]>
 # License::   The Ruby License
 # 
-# $Id: chain.rb,v 1.9 2007/12/18 13:48:42 ngoto Exp $
+# $Id: chain.rb,v 1.10 2008/04/01 10:36:44 ngoto Exp $
 #
 # = Bio::PDB::Chain
 # 
 # Please refer Bio::PDB::Chain.
 #
@@ -187,10 +187,14 @@
             if last_residue_num and 
                 (x = (residue.resSeq.to_i - last_residue_num).abs) > 1 then
               x.times { string << 'X' }
             end
             tlc = residue.resName.capitalize
-            olc = (Bio::AminoAcid.three2one(tlc) or 'X')
+            olc = (begin
+                     Bio::AminoAcid.three2one(tlc)
+                   rescue ArgumentError
+                     nil
+                   end || 'X')
             string << olc
           end
           @aaseq = Bio::Sequence::AA.new(string)
         end
         @aaseq