These mitochondria sequences have been download from GenBank database 
(2010-09-20). 

They are mitochondria sequences from Asterids and Arabidopsis thaliana.

Dir tree:
    /single_species				## only one specie per file
    	Arabidopsis_thaliana_cv_Columbia_mitochondria.fasta
	Nicotiana_tabacum_cv_BrightYellow4_mitochondria.fasta