A microelectronic assembly and related method of forming a through hole extending through a first wafer and a second wafer are provided. An image forming apparatus has an apparatus body having an image forming unit, and a developer supply container which is detachably attached to the image forming unit to supply a developer in accordance with image formation. The present invention also provides specific peptides derived from the binding domains of Arf and Dm2 which co-assemble into supramolecular structures comprised of binary anti-parallel \u03b2-strands.