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Phylogenetic analysis of the echinocandin and fellutamide NRPS A domains. Evolutionary analyses were conducted in MEGA 7.0 by using the maximum likelihood method based on the JTT matrix-based model. The tree is rooted with A domains of emericellamide synthetase (EasA). The corresponding amino acids that are activated by each subclade of A domains are indicated to the right. Numbers at nodes are likelihood bootstrap support values.
