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PredicateObject
rdf:type
lifeskim:mentions
pubmed:dateCreated
1997-12-8
pubmed:abstractText
The pH-regulated expression of the acid (AXP) and alkaline (AEP) extracellular proteases of the yeast Yarrowia lipolytica 148 was analysed. Expression in batch and continuous cultures was determined at the mRNA level by Northern blotting, and at the enzyme level by enzyme assays and Western blotting. Culture pH regulated AEP and AXP expression predominantly at the level of mRNA content. Highest levels of AEP mRNA were detected at pH 6.5 whereas highest levels of AXP mRNA were detected at pH 5.5. At pH values either side of these maxima AEP and AXP expression were progressively down-regulated. For both enzymes, the variation in mRNA levels with culture pH occurred progressively rather than by discrete steps. AXP expression did not occur above pH 7.0. Some degree of AEP expression occurred at all pH values tested in two unrelated strains of Y. lipolytica.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Sep
pubmed:issn
1350-0872
pubmed:author
pubmed:issnType
Print
pubmed:volume
143 ( Pt 9)
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
3045-54
pubmed:dateRevised
2009-11-19
pubmed:meshHeading
pubmed:year
1997
pubmed:articleTitle
pH-regulated expression of the acid and alkaline extracellular proteases of Yarrowia lipolytica.
pubmed:affiliation
School of Biochemistry, University of Birmingham, Edgbaston, UK.
pubmed:publicationType
Journal Article