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Enzymatic characteristics of phytase from Aspergillus fumigatus
Author(s): CHEN Yan, SUN Jianyi, FU Liangjian, LIU Mingqi
Pages: 59-
62
Year: 2004
Issue:
2
Journal: ACTA AGRICULTURAE ZHEJIANGENSIS
Keyword: 烟曲霉; 植酸酶; 酶学特性;
Abstract: 对烟曲霉植酸酶的酶学特性进行了研究.结果表明,其最适反应温度为60℃,最适pH为5.0;液态酶在70℃处理5 min,残余酶活为69.12%;在4℃保存2个月,残余酶活为90%;不同金属离子和螯合剂对酶活性的影响存在差异,Fe3+,Mg2+对该植酸酶有较强的激活作用, 而Zn2+,Co2+,Cu2+和EDTA有较强的抑制作用,Ca2+,Fe2+和Mn2+等对其则无明显影响.
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