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Table 2 The extensive variations in gene structure, protein structure and sequence of paralogous AAT genes produced by gene duplication in foxtail millet

From: Amino acid transporter (AAT) gene family in foxtail millet (Setaria italica L.): widespread family expansion, functional differentiation, roles in quality formation and response to abiotic stresses

Type of duplication Subfamily No. of duplicated gene groups Gene and protein structure variation Range of Ka/Ks values Duplicated gene groups
No. of TM variation No. of gene structure variation No. of conserved domain variation
Tandem duplication AAP 4 3 3 2 0.12–0.62 TD1-TD4
ATLb 3 3 1 2 0.27–0.47 TD5-TD7
GAT 1 0 1 1 0.43 TD8
LHT 2 2 2 0 0.10–0.39 TD9,TD10
ACT 1 0 1 1 0.18–0.27 TD11
CAT 1 1 1 0 0.97 TD12
PHS 1 1 0 1 0.41–0.67 TD13
Suma 13 10 (77%) 9 (69%) 7 (54%) 0.10–0.97 (0.28)  
Segmental duplication ATLa 2 0 0 2 0.10–0.12 SD1,SD2
ATLb 3 2 2 2 0.12–0.40 SD3-SD5
LHT 2 2 1 0 0.12–0.37 SD6,SD7
ACT 1 0 1 0 0.10 SD8
CAT 4 1 1 3 0.14–0.50 SD9-SD12
Suma 12 5 (42%) 5 (42%) 7 (58%) 0.10–0.50 (0.21)  
  1. aThe data in columns 4, 5 and 6 represents the total number and its proportion (in the brackets) of mutated duplicated gene groups, while that in column 7 represents the range and average (in the brackets) of Ka/Ks values