Recombination lies at the heart of many innovative processes. It is thus no surprise that a plethora of studies have investigated the impact of cross-pollination on innovation. Yet, these studies have only investigated how cross-pollination affects the creation of innovations, while overlooking how cross-pollination might influence their diffusion. Furthermore, these studies have investigated cross-pollination at the level of the individual, team or through case-studies of individual technologies while assuming that cross-pollination occurred between innovative ideas that these individuals possess. In order to address these gaps in the literature in this paper we move the unit of analysis to the level of the individual concept, and investigate how cross-pollination influences concept mobility. Our setting is the cross-pollination of concepts between nanotechnology and biotechnology, which yielded the new subfield nanobiotechnology. Drawing on a large dataset of publications, patents and press-releases between 1991 and 2005 we track how 133,128 concepts move from science to technology and commercialization. We find strong support for the hypothesis that crosspollination facilitates concept mobility. Scientists who reside in commercial firms generally assist the mobility of concepts, but hinder the mobility of cross-pollinated concepts. Furthermore, if a patent contains cross-pollinated concepts it is more valuable. This paper contributes to our understanding of how cross-pollination influences the mobility of concepts between institutional contexts, and thus augments our understanding of the commercialization process. We also detail the growth patterns of the emerging nanobiotechnology field.