Figure 2.

OBPs and CSPs involved in non-sensory functions. Mammalian OBPs have been found in secretions involved in the delivery of semiochemicals. In several cases, when isolated from such biological fluids, OBPs carry species-specific pheromones. Insect OBPs and CSPs have been reported both in pheromone glands and in reproductive organs, where they likely solubilize and bind specific pheromones. Moreover, members of both classes have been reported in other tissues and shown to be involved in functions unrelated to chemical communication. (1) Finlayson et al., 1965; Bacchini et al., 1992; (2) Dinh et al., 1965; (3) Singer et al., 1986; (4) D'Innocenzo et al., 2006; (5) Mastrogiacomo et al., 2014; (6) Marchese et al., 1998; (7) Zeng et al., 1996; (8) Nomura et al., 1992; Kitabayashi et al., 1998; (9) Zhou et al., 2013; (10) Jacquin-Joly et al., 2001; (11) Gu et al., 2013; (12) Dani et al., 2011; (13) Sun et al., 2012b; Liu et al., 2014a; (14) Iovinella et al., 2011; Maleszka et al., 2007; (15) Ishida et al., 2013; (16) Calvo et al., 2009; Costa-da-Silva et al., 2013; Marinotti et al., 2014; Li et al., 2008.