title: Biology in pictures. How the snake lost its legs.
mesh_terms: D000818:Animals; D005075:Biological Evolution; D017821:Boidae / Q000196:embryology; D018398:Homeodomain Proteins / Q000378:metabolism; D007150:Immunohistochemistry; D012911:Snakes / Q000196:embryology / Q000378:metabolism / Q000502:physiology*; D013131:Spine / Q000196:embryology / Q000378:metabolism / Q000502:physiology
chemical_list: D018398:Homeodomain Proteins; C080041:Hoxc6 protein, mouse