--- a/galaxy-conf/PercusDecomposition.xml	Mon Apr 09 11:50:23 2012 -0400
+++ b/galaxy-conf/PercusDecomposition.xml	Wed Apr 25 16:53:48 2012 -0400
@@ -10,8 +10,16 @@
   </outputs>
   
 <help>
-.. class:: warningmark
+  
+This tool derives an external potential energy function from experimental nucleosome positioning data by assuming that nucleosomes interact with DNA like a fluid of hard rods. This energy function can then be used to derive sequence-specific nucleosome formation preferences, while accounting for hard-core steric restriction by adjacent nucleosomes. This tool is a reimplementation of the algorithm described in (Locke et al. 2010).
+  
+-----
 
-See Locke G, Tolkunov D, Moqtaderi Z, Struhl K and Morozov AV (2010) High-throughput sequencing reveals a simple model of nucleosome energetics. Proceedings of the National Academy of Sciences 107: 20998–21003 and Percus JK (1976) Equilibrium state of a classical fluid of hard rods in an external field. J Stat Phys 15: 505–511 for derivation.
+**Citations**
+
+Locke G, Tolkunov D, Moqtaderi Z, Struhl K and Morozov AV (2010) High-throughput sequencing reveals a simple model of nucleosome energetics. Proceedings of the National Academy of Sciences 107: 20998–21003
+
+Percus JK (1976) Equilibrium state of a classical fluid of hard rods in an external field. J Stat Phys 15: 505–511
+
 </help>
 </tool>