Mitochondrial membrane ATP synthase (F(1)F(0) ATP synthase or Complex V) produces ATP from ADP in the presence of a proton gradient across the membrane which is generated by electron transport complexes of the respiratory chain. F-type ATPases consist of two structural domains, F(1) - containing the extramembraneous catalytic core, and F(0) - containing the membrane proton channel, linked together by a central stalk and a peripheral stalk. During catalysis, ATP synthesis in the catalytic domain of F(1) is coupled via a rotary mechanism of the central stalk subunits to proton translocation. Part of the complex F(0) domain and the peripheric stalk, which acts as a stator to hold the subunits of the catalytic subcomplexes relative to the rotary elements (Probable). Plays a role in germline development (PubMed:17223323). Subunit of the F-type ATPase which has 2 components, CF(1) - the catalytic core - and CF(0) - the membrane proton channel. Specifically expressed in the germline from the L1 larval stage. RNAi-mediated knockdown results in sterility (PubMed:17223323). RNAi-mediated knockdown does not affect the timing of hypodermal and vulval development (PubMed:17223323). Belongs to the eukaryotic ATPase B chain family.