GO:0045177; C:apical part of cell; IDA:RGD.
GO:0016324; C:apical plasma membrane; IEA:Compara.
GO:0031526; C:brush border membrane; IEA:Compara.
GO:0005768; C:endosome; IEA:Compara.
GO:0000220; C:vacuolar proton-transporting V-type ATPase, V0 domain; IEA:InterPro.
GO:0015078; F:hydrogen ion transmembrane transporter activity; IEA:InterPro.
GO:0015991; P:ATP hydrolysis coupled proton transport; IEA:Compara.
GO:0007588; P:excretion; IEA:Compara.
GO:0001503; P:ossification; IEA:Compara.
GO:0006885; P:regulation of pH; IEA:Compara.
GO:0007605; P:sensory perception of sound; IEA:Compara.