Get the code of the gbm gene;
usage:bash gbM.mCG.sh m_C.txt all_C.txt outfile_ID genome.fa
m_C.txt : from methratio.py and binomialtest;
all_C.txt : from methratio.py;
genome.fa : calculate numer of CG, CHG and CHH sites in whole genome.
Path to success : /gpfsdata/shiyan/Mango/Meth/gbM
cite : On the origin and evolutionary consequences of gene body DNA methylation