Sequence comparison of K14 from bichir, sturgeon and gar. Multiple alignment of the keratin 14 (K14) sequences we obtained from bichir, sturgeon and gar. Thick black lines mark the four helical subdomains (coils 1A to 2B), which are typical for the central rod domain of all known IF-proteins. Asterisks indicate identical amino acids; double dots indicate a high and single dots a lower degree of amino acid conservation. Pse, Polypterus senegalus (bichir); Aba, Acipenser baeri (sturgeon); Loc, Lepisosteus oculatus (gar). Note that only AbaK14 comprises the complete amino acid sequence. From PseK14a at least a section and from LocK14 the complete head sequence is still missing. From PseK14b we still have to recover both, the complete head and tail sequence.