Chicken ZP1 and ZP3 assemble through strong interactions between their ZP-C domains.
ZP-C domains of chicken ZP1 and ZP3 are deeply embedded in the egg-coat matrix.
Chicken ZP1 forms a homocomplex through non-covalent interaction between repeat domains.
Chicken ZPD is deposited on the interstices of ZP1–ZP3 matrix in the egg coat.
We propose a model for the architecture of chicken egg-coat matrix from these results.