wrt-9 encodes a hedgehog-like protein, with an N-terminal signalsequence, a Wart domain, and a C-terminal region of proline-rich,low-complexity sequence; the Wart domain is predicted to form acysteine-crosslinked protein involved in intercellular signalling, andit has subtle similarity to the N-terminal Hedge domain of HEDGEHOGproteins; WRT-9 has no obvious function in RNAi assays.