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Fig. 2. Conserved domains in AMPK subunits: (A)
subunits, (B) ß subunits and (C)
subunits. The proposed function of each domain is indicated. The two isoforms of the
(
1,
2) and ß (ß1, ß2) subunits have very similar structures, but the three isoforms of the
subunit (
1,
2,
3) contain variable N-terminal regions of unknown function, and are drawn separately. [Redrawn from Hardie et al. (Hardie et al., 2003).]