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Table 4
Sirtuin classes with reference to all the entire sequences (A), N-terminal (B) and C-terminal (C) regions
A
	Class I	Class II	Class III	Class IV
SIRT1	x
SIRT2	x
SIRT3	x
SIRT4		x
SIRT5			x
SIRT6				x
SIRT7				x
B
	Class N-I	Class N-II	Class N-III	Class N-IV	Class N-V
SIRT1	x
SIRT2		x
SIRT3			x
SIRT4					x
SIRT5					x
SIRT6				x
SIRT7				x
C
	Class C-1	Class C-II
SIRT1	x
SIRT2		x
SIRT3		x
SIRT6	x
SIRT7	x

Costantini et al. BMC Evolutionary Biology 2013 13:60 doi:10.1186/1471-2148-13-60

Table 4