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Diagram of sperm specific integrin subunits and heterodimers. The solid lines show proven integrin heterodimers α3β1, α6β1 and α6β4; the arrows show predicted α3 and α6 dynamics with β1; α3 and β4 cis interaction are energetically unstable in contract to trans interaction. Heterodimers between αV and β1/β3 are not known.
