Bundle up: The introduction of streptavidin (as a linker) between two FeII(terpyridine–bis‐biotin) connectors affords a one‐dimensional metal–organic protein framework (MOPF). In the presence of calcium ions and CO2 vapors, these MOPF aggregates form protein bundles that template the biomineralization of calcite.

Alternating: a cofactor dyad consisting of a heme group (red in picture) and a bis(biotin) unit (blue) was synthesized and shown to specifically bind to both apomyoglobin and streptavidin. In the presence of the dyad, the 1:1 association of a disulfide-bridged myoglobin dimer (green) with streptavidin (gray) afforded a submicrometer-sized fibrous alternating copolymer.

Gebündelte Proteine: Mit Streptavidin als Linker zwischen Eisen(II)‐Terpyridinbis(biotin)‐Einheiten entsteht ein eindimensionales metall‐organisches Proteingerüst (MOPF). In Gegenwart von Calciumionen und Kohlendioxidgas bilden die MOPFs Proteinbündel, die als Templat der Biomineralisation von Calcit wirken.

Scheme 1. Molecular structures of the heme-bis(biotin) dyads 1 a-c.

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