passages.id: split_5_test_98_passage
passages.type: progene_text
passages.text: Sequence and structural comparisons , which include a characteristic LBD , a series of three homologous cysteine - rich repeats , membrane proximal sequence ( LLTFIHD ) , cytoplasmic NPXY motifs , and predicted domain lengths of the molluscan protein , clearly identifies it as an integrin homologue .