| http://www.w3.org/ns/prov#value | - Transformants showing similar growth on CSM???Lys in the presence and absence of serine were chosen for further analysis, including analysis of their effect on expression of a CHA1-MEL1 reporter gene, as described in Materials and Methods.Using this protocol, screening of approximately 8,000 transformants resulted in identification of six histone H3 mutants that caused significant derepression of
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