An occluding cell-cell junction formed between the membranes of the apical end of an invading cell (e.g. a merozoite in Plasmodium) and a host target cell (e.g. erythrocyte for Plasmodium infection). The junction is a stable yet dynamic structure that moves around the symbiont cell during invasion, enclosing it in a vacuole surrounded by a membrane. [ http://www.ncbi.nlm.nih.gov/pubmed/21803641 GOC:jl ]