http://www.youtube.com/watch?v=Nmkj5gq1cQU&feature=related
Super Cow are bread from Belgium, because of the natural selection,a protein that counteracts muscle growth occur they are selected from specific genes, and are artificially bread
resulting in accelerated lean muscle growth. The defect in the breed's gene is maintained through linebreeding. This mutation also interferes with fat deposition, resulting in very lean meat.
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