<p>Human annexin XXXI was first identified in silico by searches of db-EST witha number of divergent annexins [<cite idref="PUB00013923"/>]. The full-length cDNA encoded a proteinof 338 residues, with less than 40% sequence identity to other annexins. Themost striking distinction of the type XXXI subtype is the complete ablationof all four type II calcium-binding sites in the conserved tetrad core. The protein is well represented in actively differentiating tissues.</p> Annexin, type XXXI