Corrected altloc rules for polypeptide detection

biopython · Oct 25, 2005 · 45afc89 · 45afc89
1 parent 339d126
commit 45afc89
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/Bio/PDB/Polypeptide.py b/Bio/PDB/Polypeptide.py
@@ -335,10 +335,10 @@ def _is_connected(self, prev, next):
             for cc in clist:
                 # To form a peptide bond, N and C must be 
                 # within radius and have the same altloc
-                # identifier
+                # identifier or one altloc blanc
                 n_altloc=nn.get_altloc()
                 c_altloc=cc.get_altloc()
-                if n_altloc==c_altloc: 
+                if n_altloc==c_altloc or n_altloc==" " or c_altloc==" ": 
                     if test_dist(nn, cc):
                         # Select the disordered atoms that
                         # are indeed bonded