From: Evidence against the energetic cost hypothesis for the short introns in highly expressed genes
 | Large tissue/organ (number of specific genes; tissue/organ weight)b | Small tissue/organ (number of specific genes; tissue/organ weight)b |
---|---|---|
Homo sapiens | Cultured adipocytes (18; 9 Kg) | Brain amygdala (22; --) |
 | Liver (79; 1.5 Kg) | Hypothalamus (7; 4 g) |
 | Lung (18; 1 Kg) | Pituitary (6; 5 g) |
 | Skeletal muscle (4; 27 Kg) | Tonsil (1; 30–40 g) |
 | Skin (6; 5 Kg) | Prostate (13; 20 g) |
 | Smooth muscle (24; --) | Thymus (11; 30–40 g) |
 |  | Thyroid (25; 18–60 g) |
 |  | Tongue (11; 70 g) |
Mus musculus | Adipose tissue (13; --) | Amygdala (4; --) |
 | Liver (76; 2 g) | Hypothalamus (12; < 60 mg) |
 | Skeletal muscle (47; --) | Pituitary (29; 3 mg) |
 | Epidermis (4; --) | Trigeminal (7; --) |
 |  | Prostate (24; 0.11 g) |
 |  | Thymus (64; < 60 mg) |
 |  | Thyroid (21; 15 mg) |
 |  | Tongue epidermis (14; --) |
 |  | Retina (71; --) |