#chr	length	GC%
A	2303261	0.486869703434
B	3066374	0.489024496033
C	3272609	0.486411911719
D	3633272	0.493249335585
E	4224103	0.493432333445
F	4003362	0.491534115576
# total	20502981.0	0.490512233319