diff --git a/README.md b/README.md
--- a/README.md
+++ b/README.md
@@ -12,7 +12,7 @@ This repository shows the work done in E
 
 ### Genotype
 
-lacIq rrnBT14 ΔlacZWJ16 hsdR514 ΔaraBADAH33 ΔrhaBADLD78
+lacI+ rrnBT14 ΔlacZWJ16 hsdR514 ΔaraBADAH33 ΔrhaBADLD78
 
 ### Phenotype
 
@@ -24,6 +24,6 @@ This is the wild-type strain used for E.
 
 ### References
 
-- https://www.pnas.org/content/97/12/6640
-- https://cgsc.biology.yale.edu/Strain.php?ID=64667
-
+1. https://www.pnas.org/content/97/12/6640
+2. https://cgsc.biology.yale.edu/Strain.php?ID=64667
+3. Baba, T., T. Ara, M. Hasegawa, Y. Takai, Y. Okumura, M. Baba, K.A. Datsenko, M. Tomita, B.L. Wanner, H. Mori 2006. Construction of Escherichia coli K-12 in-frame, single-gene knockout mutants: the Keio collection. Mol Syst Biol 2:1-11