Table 1.

Statistics of CAZy database accessed at 27th November, 2015.

Fold	Mechanism	GT-Family	GTs	Characterized	Structures
GT-A	Inverting	84, 82, 43, 21, 13, 12, 7, 2	68,434 (59,527)	351 (141)	15 (7)
	Retaining	81, 78, 64, 55, 27, 24, 15, 8, 6	6,939 (3,656)	155 (30)	24 (9)
GT-B	Inverting	80, 70, 68, 65, 63, 41, 33, 30, 28, 23, 19, 10, 9, 1	32,069 (26,654)	503 (175)	52 (38) (2 crystal)
	Retaining	72, 35, 20, 5, 4, 3	65,550 (53,879)	379 (147)	38 (32) (1 crystal)
GT-C	Inverting	87, 85, 83, 66, 59, 58, 57, 50, 39, 22	8,704 (5,184)	80 (17)	8 (2)
	Retaining	–	–	–	–
Not defined	Inverting	97, 94, 92, 90, 76, 75, 74, 73, 67, 61, 56, 54, 53, 51, 49, 48, 47, 42, 40, 38, 37, 31, 29, 26, 25, 18, 17, 16, 14, 11,	28,445 (21,184)	356 (82)	16 (10)
	Retaining	96, 95, 93, 89, 88, 79, 77, 71, 69, 62, 60, 45, 44, 34, 32	5,903 (1,798)	81 (25)	7 (6)

Numbers in clamps represent bacterial GTs.