Implicated in a number of adherence functions. OPA proteins are implicated in pathogenesis and are subject to phase variation. 234 OP28_NEIGO Opacity protein V28 (Fragment) AGEDHGRGPYVQADLAYAYEHITHDYPEPTGTKKDKISTVSDYFRNIRTHSIHPRVSVGYDFGGWRIAADYARYRKWNDNKYSVDIKELENKNQNKRDLKTENQENGTFHAVSSLGLSAVYDFKLNDKFKPYIGARVAYGHVRHSIDSTKKTTKFLTSSYGGLNPTVYTEENTQNAHHQSNSIRRVGLGVIAGVGFDITPKLTLDAGYRYHNWGRLENTRFKTHEASLGVRYRF