Enables identical protein binding activity. Involved in several processes, including cellular response to mechanical stimulus; cellular response to nitric oxide; and response to vitamin A. Located in alveolar lamellar body; extracellular space; and multivesicular body. Biomarker of bacterial pneumonia and newborn respiratory distress syndrome. Human ortholog(s) of this gene implicated in asthma; lung disease (multiple); and respiratory syncytial virus infectious disease. Orthologous to human SFTPC (surfactant protein C). [provided by Alliance of Genome Resources, Apr 2022]