Fig. 1. Alignment of human CLC (CLCh) with human CNTF (CNTFh) and murine LIF (LIFm). Conserved residues are in bold. The residues of CNTFh and LIFm corresponding to helices A–D are in red. The residues of CNTF whose coordinates are not resolved in the crystal structure are in blue. The sequences of the leader peptides have been removed.