[Jmol-users] Bug? Secondary structure in PDB/CIF ignored.

[<m0...@ya...>]

Dear Bob,
In Jmol.jar 16.3.33, 16.2.5:
$ load =1pgb$ cartoon only$ color structure



One strand of the beta sheet, residues 1-9, is not rendered as a beta strand, despite being so designated by the authors of the PDB file: 
HELIX    1   1 ALA A   23  ASP A   36  1                                  14    
SHEET    1  S1 4 LEU A  12  ALA A  20  0                                        
SHEET    2  S1 4 MET A   1  GLY A   9 -1                                        
SHEET    3  S1 4 LYS A  50  GLU A  56  1                                        
SHEET    4  S1 4 GLU A  42  ASP A  46 -1                                        

(At the end of each SHEET line, 0 means the first strand of a sheet, 1 means parallel to the preceding strand, and -1 means antiparallel.)
$ calculate structure$ cartoon
Now residues 1-9 are rendered as a beta strand.
The same behavior occurs when loading the mmCIF file.
I have not looked for nor observed other examples.
-Eric