CTH2: caudal type homeobox gene 2 ER: estrogen receptor PLC: pleomorphic lobular carcinoma PR: progesterone receptor PSA: prostate-specific antigen TTF1: thyroid transcription factor

A new Caenorhabditis elegans homeobox gene, ceh-25, is described that belongs to the TALE superclass of atypical homeodomains, which are characterized by three extra residues between helix 1 and helix 2. ORF and PCR analysis revealed a novel type of alternative splicing within the homeobox. The alternative splicing occurs such that two different homeodomains can be generated, which differ in th...