Figure 4From: Shaping mechanisms of metal specificity in a family of metazoan metallothioneins: evolutionary differentiation of mollusc metallothioneinsElectrospray ionization (ESI) time-of-flight mass spectroscopy (MS) spectra of an equimolar mixture of recombinant Cd 6 -HpCdMT and Cu 12 -HpCuMT, recorded at (a) t = 0 and (b) t = 20 h, showing that no metal exchange occurs between the two HpMT isoforms at 25°C. MT, metallothionein.Back to article page