Figure 2

Supernetworks displaying relationships inferred from phylogenetic analysis of different gene regions. A. Supernetwork reconstructed using strict consensus maximum likelihood trees for NifB, NifN, NifS and ABC, HesA, NdhK, ModC, PerM, UvrD, SAM, Sbr0014 of different cyanobacetria (see Materials and Methods). B. Supernetwork reconstructed using strict consensus maximum likelihood trees for NifD, NifH, NifK, NifE, and ABC, HesA, NdhK, ModC, PerM, UvrD, SAM, Sbr0014. The networks are outgroup rooted using Synechocystis PCC 6803. A reticulation occurs in the centre of both graphs because of the local instability in the placement of Synechocystis PCC 6803.