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  • A prototroph for compound X can make it
  • A bradytroph grows faster if X is scavenged
  • An auxotroph needs to scavenge X
  • A hyperauxotroph lacks both the biosynthetic pathway and the transporters for X

However, I cannot find the term for when the metabolism is rerouted to not need that compound. A term exists and it isn't with an obvious prefix like para, exo, ecto, juxta or similar, but that is as much as I recall: I cannot recall it or where I read it. Has anyone ever encountered said term?

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Perhaps you're looking for the word mixotroph?

  • A mixotroph is an organism that can use a mix of different sources of energy and carbon.

  • In other words, as stated by Schoonhoven (2010):

    The capability of one organism to be autotrophic and heterotrophic at the same time.

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  • $\begingroup$ I was thinking in terms of artificially "biotin-independent" bacteria, where the requirement for biotin is circumvented. However, a different group made it first and they simply used the word independent. Using a different example, E. coli is ascorbic acid-independent (GSH acts as vitamin C), it is auxotrophic for B12 (combalamin), but it is prototrophic for methionine (as it has both routes). $\endgroup$ – Matteo Ferla Mar 12 at 12:57

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