... report the results of a study, combining transcriptomic and proteomic approaches, designed to increase our knowledge of the structure and function of oyster MTs in the American oyster, C virginica, ... MT This theory of domain duplication is further supported by the widespread occurrence of the ab- and ba-domain structures of many invertebrate and vertebrate MTs and their roles in zinc homeostasis ... the a- and b-domains of invertebrate and vertebrate domains would require an inversion within the MT gene of the a and b encoding segments, an event of which there is no obvious record in the genes...