diff --git a/README.md b/README.md
index 27db1702fa2523cd5804fd3ce93dc183e8bf869d..aa8de2714bf9a5afafa8ade71b2ea3eabb0dfb09 100644
--- a/README.md
+++ b/README.md
@@ -45,12 +45,17 @@ Test if Log(FC) = 0 <br/>
 With DESeq2, the Wald test is the default used for hypothesis testing when comparing two groups. The Wald test is a test of hypothesis usually performed on parameters that have been estimated by maximum likelihood. The Wald test is also a standard way to extract a P value from a regression fit.
 
 
-## Investigation of µ effect 
+## Investigations
+
+Let µ and alpha constant between samples, replicates and genes 
+
+1) µ effect 
+
 <p align="center">
 <img src="./img/fig_mu_effect.svg"  width="500" height="500">
 </p>
 
-## Investigation of alpha effect 
+2) alpha effect 
 
 <p align="center">
 <img src="./img/fig_size_effect.svg"  width="500" height="500">