ScMT2-1-3, a Metallothionein Gene of Sugarcane, Plays an Important Role in the Regulation of Heavy Metal Tolerance/Accumulation

Table 1

Classification of MT2s of plants.

Subgroup	Feature of Cys-rich domains at amino- and carboxy-terminal regions
MT2-1	CCXXXCXCXXXCXCXXXCXXC......CXCXXXCXCXXCXC
MT2-2	CCXXXCXCXXXCXCXXXCXXC......CXCXXCXCXXXCXCXCCXC
MT2-3	CCXXXCXCXXXCXCXXXCXXC......CXCXXCXCXXXCXXCXCCXC

Note: “C” represents a Cys residue, X represents an amino acid residue other than Cys, and “......” represents the intermediate region between the two Cys-rich domains.