- A genomic region encompassing a cluster of olfactory receptor genes and a myosin light chain kinase (MYLK) gene is duplicated on human chromosome regions 3q13-q21 and 3p13. Brand-Arpon, V., Rouquier, S., Massa, H., de Jong, P.J., Ferraz, C., Ioannou, P.A., Demaille, J.G., Trask, B.J., Giorgi, D. Genomics (1999)