diff --git a/negspy/data/ce11/chromInfo.txt b/negspy/data/ce11/chromInfo.txt
index 1c2af1a..333a429 100644
--- a/negspy/data/ce11/chromInfo.txt
+++ b/negspy/data/ce11/chromInfo.txt
@@ -1,7 +1,7 @@
-chrI    15072434
-chrII   15279421
-chrIII  13783801
-chrV    20924180
-chrIV   17493829
-chrX    17718942
-chrM    13794
\ No newline at end of file
+chrI	15072434
+chrII	15279421
+chrIII	13783801
+chrIV	17493829
+chrV	20924180
+chrX	17718942
+chrM	13794