The amino acid sequence of ovocleidin 17, a major protein of the avian eggshell calcified layer.

The amino acid sequence of ovocleidin 17, a major protein of the chicken eggshell calcified layer, contains 142 amino acids including 2 phosphorylated serines. Data base searches show that ovocleidin belongs to a heterogeneous group of proteins consisting of a single C-type lectin domain (CTL). The most similar sequences with an average of 30% identical amino acids were those of pancreatic stone protein (lithostathine) and lectins and anticoagulant proteins from snake venom.