require 'maasha/patternmatcher'
require 'maasha/bits'
-#require 'maasha/backtrack'
+require 'maasha/backtrack'
require 'maasha/digest'
#require 'maasha/patscan'
class Seq
#include Patscan
include PatternMatcher
-# include BackTrack
+ include BackTrack
include Digest
attr_accessor :seq_name, :seq, :type, :qual