diff --git a/assays/leaf_sampling/protocols/leaf_sampling.txt b/assays/leaf_sampling/protocols/leaf_sampling.md
similarity index 90%
rename from assays/leaf_sampling/protocols/leaf_sampling.txt
rename to assays/leaf_sampling/protocols/leaf_sampling.md
index f22b452cacf21c84ade5b3c29001643a645fb91d..340a6ba698f0536ac0015b06f4676abe0bce2f5e 100644
--- a/assays/leaf_sampling/protocols/leaf_sampling.txt
+++ b/assays/leaf_sampling/protocols/leaf_sampling.md
@@ -1,4 +1,4 @@
-leaf sampling for RNA extraction
+## Leaf sampling for RNA extraction
 
 -	place two 3 mm metal beads into 2.0 ml tube
 -	always sample the youngest, fully elongated leaf (auricles are clearly visible)