diff --git a/read_data.py b/read_data.py
index cfc1ca7..2211bc8 100644
--- a/read_data.py
+++ b/read_data.py
@@ -32,6 +32,7 @@ def read_data_genome(dir_name,a,dict_ind_genome):
         for y in ["gene_version","gene_name","gene_source","gene_biotype","gene_id"]:
             data_gene[y]=data_gene[y].apply(clear_data)
         #print(data_gene[0:10])
+        data_gene=data_gene[data_gene['gene_biotype']=='protein_coding']
         a.append(data_gene)
         n=x.split(".")[0]
         dict_ind_genome[n]=len(a)-1