F-actin in the cuticular plate and junctions of auditory hair cells is regulated by ADF and cofilin to allow for normal stereocilia bundle patterning and maintenance.

Auditory hair cells, which convert sound-induced vibrations in the inner ear into neural signals, depend on multiple actin populations for normal function. Stereocilia are mechanosensory protrusions formed around a core of linear, crosslinked F-actin. They are anchored in the cuticular plate, which predominantly consists of randomly oriented actin filaments.

Nucleotide- and Protein-Dependent Functions of .

Cytoplasmic β- and γ-actin proteins are 99% identical but support unique organismal functions. The cytoplasmic actin nucleotide sequences  and , respectively, are more divergent but still 89% similar.  mice are embryonic lethal and  cells fail to proliferate, but editing the  gene to express γ-actin () resulted in none of the overt phenotypes of the knockout revealing protein-independent functions for .