| http://www.w3.org/ns/prov#value | - Surprisingly, the requirements for finding a way out of this dilemma have now been found, enabling a satisfactory concentration of natural substances to be obtained from microorganisms, in particular myxobacteria, which produce epothilones such as epothilone A or B, in particular a concentration of epothilones A and B, in the culture medium, without the addition of resins, and thus enabling produc
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