diff --git a/assays/S4_A2_protein_expression/dataset/western_blot_raw/Readme.txt b/assays/S4_A2_protein_expression/dataset/western_blot_raw/Readme.txt
new file mode 100644
index 0000000000000000000000000000000000000000..68067162f180e17571d6d73aac1384acddee03d7
--- /dev/null
+++ b/assays/S4_A2_protein_expression/dataset/western_blot_raw/Readme.txt
@@ -0,0 +1,7 @@
+2988 (or KAG) - pcrg1:khd4-ada-gfp (ip)
+2989 (or KG)- pcrg1:khd4-gfp (ip) 
+3083 (or mkAG) - pcrg1:mKate2-ada-gfp (ip)
+Khd4D - AB33: khd4D
+Wt (or AB33) -AB33
+A or Ara or on = Arabinose
+G or Gfp or off = Glucose
\ No newline at end of file