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