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海藻中多肽(PC2~PC4)的测定及对Zn2+诱导响应

DOI: 10.13634/j.cnki.mes20150519, PP. 754-758

Keywords: 高效液相色谱,多肽,荧光标记,金属诱导

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Abstract:

本研究以海带为试验载体,建立了海藻中多肽(γ-Glu-Cys)n-Gly的分离、提取技术,并建立了反相C18色谱柱分离-高效液相色谱-荧光法测定海带中多肽的含量;研究中利用不同浓度的Zn2+胁迫培养藻体,考察了海带对Zn2+的富集能力,探索了藻体中H-(γ-Glu-Cys)2-Gly-OH(PC2),H-(γ-Glu-Cys)3-Gly-OH(PC3),H-(γ-Glu-Cys)4-Gly-OH(PC4)3种肽对Zn2+的诱导响应。结果显示,高效液相色谱-荧光法测定多肽化合物,PC2、PC3和PC4分离效果较好,3种化合物出峰时间主要集中在16.6~20.2min间,方法线性相关性良好(r>0.9995),检出限较低,重线性较好(RSD2+具有较强的富集能力,随着培养时间的增长及金属浓度的增加,藻体内Zn2+含量增加明显;藻体中PC2、PC3和PC4随着Zn2+诱导时间的增长其浓度稍微增加,并与藻体内Zn2+的含量呈现正相关。

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