Figure 2.

The model. (a) A single monomer of endothelin 1 with all atoms and associated water molecules. (b) A rainbow representation of the two endothelin molecules comprising the asymmetric unit of the crystal and representing a putative dimer. The amino-terminus is in blue and the carboxy-terminus is in red. (c) An all-atom plus waters representation of the pair of endothelin molecules comprising the crystallographic asymmetric unit. The molecules are all in the same orientation. C atoms are yellow, O atoms red and N atoms blue.