restriction_enzyme.rb in bio-1.4.3

- old
+ new

@@ -3,15 +3,13 @@
 #
 # Author::    Trevor Wennblom  <mailto:trevor@corevx.com>
 # Copyright:: Copyright (c) 2005-2007 Midwinter Laboratories, LLC (http://midwinterlabs.com)
 # License::   The Ruby License
 #
-#  $Id:$
-#
 
 module Bio
 
-  autoload :REBASE, 'bio/db/rebase'
+  autoload :REBASE, 'bio/db/rebase' unless const_defined?(:REBASE)
 
 # = Description
 # 
 # Bio::RestrictionEnzyme allows you to fragment a DNA strand using one
 # or more restriction enzymes.  Bio::RestrictionEnzyme is aware that