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Table 1 Number of housekeeping and tissue-specific genes

From: A comprehensive functional analysis of tissue specificity of human gene expression

Tissues SN10
Housekeeping 2374
Liver 22
Skeletal muscle 37
Fetal liver 16
Testis 484
Placenta 38
Bone marrow 63
Skin 75
Adrenal gland 13
Prostate 14
Trachea 16
Small intestine 35
Peripheral blood lymphocytes 49
Mammary gland 16
Tonsil 24
Thymus 4
Spleen 14
Fetal kidney 5
Thyroid 7
Brain 34
Heart 26
Lung 16
Salivary gland 17
Ovary 15
Pancreas 20
Fetal thymus 8
Colon 9
Spinal cord 24
Retina 190
Kidney 17
Uterus 12
Fetal brain 61
Average 43.8
Average, somatic tissues 30.9