Table 5 Number of tissue-specific genes with copy number variation. Tissue Number of tissue-specific genes Number of tissue-specific CNV genes Testes 531 4 Brain 318 0 Spleen 81 1 Duodenum 6 0 Colon 40 1 Liver 69 0 Lung 45 0 Kidney 75 0 Ovary 0 0 Endometrium 0 0 Uterus 0 0 Rumen 117 0 Mesenteric fat 8 0 Adipose 0 0 Hypothalamus 0 0 Heart 14 0 Skeletal muscle 37 0 Pituitary gland 0 0 Subcutaneous fat 0 0 Longissimus dorsi muscle 0 0 Jejunum 6 0 Ileum 8 0