The invention overcomes the deficiencies of the prior art by providing a rapid approach for isolating polypeptides capable of anchoring heterologous polypeptides to a bacterial inner membrane. In the technique, libraries of candidate anchor polypeptides are expressed as fusions with a heterologous polypeptide...http://www.google.com.au/patents/US7611866?utm_source=gb-gplus-sharePatent US7611866 - Selection of bacterial inner-membrane anchor polypeptides