-ftp://ftp.wwpdb.org/pub/pdb/doc/format_descriptions/Format_v33_Letter.pdf<FONT COLOR="#0000ff">ftp://ftp.wwpdb.org/pub/pdb/doc/format_descriptions</FONT>). The REMARK, ATOM, SSBOND, HELIX, SHEET, CONECT, TER, and ENDMDL are used.
+<a href="ftp://ftp.wwpdb.org/pub/pdb/doc/format_descriptions/Format_v33_Letter.pdf">ftp://ftp.wwpdb.org/pub/pdb/doc/format_descriptions</a>). The REMARK, ATOM, SSBOND, HELIX, SHEET, CONECT, TER, and ENDMDL are used.