Science, Maths & Technology
General principles of cellular communication
...C. elegans does not possess genes for the hedgehog signalling pathway that are found in other organisms (insects and other nematodes) that share a close common ancestor. Table 1 Numbers of particular ligands and receptors in selected pathways in a variety of eukaryotes (Note that a ligand is any molecule (or ion) that binds to a protein at a specific binding site.) H....