update tutorial

gromacstutorials · May 28, 2024 · 1b31135 · 1b31135
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diff --git a/docs/gromacstutorials-inputs b/docs/gromacstutorials-inputs
diff --git a/docs/sphinx/source/tutorials/level1/protein-in-electrolyte.rst b/docs/sphinx/source/tutorials/level1/protein-in-electrolyte.rst
@@ -17,5 +17,20 @@ Protein in electrolyte
 .. include:: ../../non-tutorials/needhelp.rst
 .. include:: ../../non-tutorials/recommand-salt.rst
 
+Convert the pdb file
+====================
+
+.. container:: justify
+
+    Download the *.pdb* file from the |ProteinDataBank|, or simply
+    click |1cta.pdb|.
+
+.. |ProteinDataBank| raw:: html
+
+    <a href="https://www.rcsb.org/structure/1CTA" target="_blank">Protein Data Bank</a>
+
+.. |1cta.pdb| raw:: html
+
+    <a href="https://raw.githubusercontent.com/gromacstutorials/gromacstutorials-inputs/main/level1/protein-in-electrolyte/1cta.pdb" target="_blank">here</a>
 
 .. include:: ../../non-tutorials/accessfile.rst