- Organization of the bovine alpha 2-fucosyltransferase gene cluster suggests that the Sec1 gene might have been shaped through a nonautonomous L1-retrotransposition event within the same locus. Saunier, K., Barreaud, J.P., Eggen, A., Oriol, R., Levéziel, H., Julien, R., Petit, J.M. Mol. Biol. Evol. (2001)