Trophinin and tastin (TROAP*-trophinin-assisting protein; cytogenetic band: 12q13.12.) cell-to-cell contacts transfected with an expression vector encoding influenza virus haemagglutinin (HA)-tagged identified Tctex-1, one of the light chains of cytoplasmic dynein, as a tastin-interacting proteins identified Tctex-1 16/16 residues correct, on day 16/17 (The time consistent with that expected for the "implantation window.") one of the light chains of cytoplasmic dynein, as a tastin-binding protein. Seen as a pattern resembling a cell adhesion molecule between embryonic and maternal cells at the time of implantation as an assisting protein with the exception of macrophages dose not appear to be expressed in various other types of human cells. TROAP trophinin associated protein (tastin) form a cell adhesion molecule complex that mediates an initial attachment of the blastocyst to uterine epithelial cells. Human endometrium is the end organ of the hypothalamic-pituitary-ovarian axis at the time of implantation in ectopic pregnancy (The fertilized ovum is implanted in any tissue other than the uterine wall.) potentially involved in human embryo implantation of two human tumor cell lines that mimic the biological behaviors of a blastocyst and uterine luminal epithelial cells used to identify trophonin, bystin and tastin differentially expressed in the perineural invasion (PNI) in vitro model, and help avert the need for intracytoplasmic sperm injection. There are 3 articles* specifically referring to this gene and altogether 2 different isoforms (3 COOH complete) altenatively expressed as a major 3.2- and a minor 3.5-kb mRNA, resembling the two mRNA variant roadblock genes (2 spliced) appear not to encode good proteins.