Diagnostic characteristics of MT subfamilies 7a and 7b

C, K and X = cysteine, lysine and any amino acid other than C, respectively.*Consensus sequence. In subfamily 7a this motif is present exclusively at C-termini of type 2 submodules, which in turn exclusively constitute the C-termini of modules.**To the extent reported so far: MTT1[20]; this work); MTT3 and MTT5 (this work); TpigMT-1 and TpigMT-2[19]; TpMT1 and TpMT2[18]; MTT2 and MTT4 (L-F Feng and W. Miao, personal communication).