Peptide bond, a chemical bond formed between two molecules when the carboxyl group of one molecule reacts with the amine group of the other molecule
They are from amino-terminus to carboxyl-terminus an Insulin-like growth factor binding domain, a kazal domain, a trypsin-like peptidase domain and a PDZ domain.
Signal sequences in the amino- and carboxy- terminal ends are removed posttranslationally, resulting in a mature length of 208.