- Isolation and expression of the human hPF20 gene orthologous to Chlamydomonas PF20: evaluation as a candidate for axonemal defects of respiratory cilia and sperm flagella. Pennarun, G., Bridoux, A.M., Escudier, E., Dastot-Le Moal, F., Cacheux, V., Amselem, S., Duriez, B. Am. J. Respir. Cell Mol. Biol. (2002)