1. 
   Megabase
   Megabase: Unit of length for DNA fragments that is equal to 1 million nucleotides. A megabase (Mb) is roughly equal to 1 centiMorgan (cM).
   Found op http://www.medterms.com/script/main/art.html?articlekey=25475
   
   
2. 
   megabase
   <molecular biology, unit> Unit of length for DNA fragmentsequal to 1million nucleotides androughly equal to 1 cM. ... (29 Oct 1998) ...
   Found op http://www.mondofacto.com/facts/dictionary?megabase
   
   
3. 
   Megabase
   Unit of length for DNA fragments equal to 1 million nucleotides and roughly equal to 1 cM.
   Found op http://www.ornl.gov/sci/techresources/Human_Genome/glossary/glossary.shtml
   
   
4. 
   Megabase
   Unit of length for DNA fragments equal to 1 million nucleotides and roughly equal to 1 cM.
   Found op http://www.ornl.gov/sci/techresources/Human_Genome/glossary/glossary_m.shtm
   
   

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