Purification and characterization of lipovitellin from crucian carp (Carassius carassius) and establishment of a sandwich ELISA
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Marine Life Science College, Ocean University of China, Qingdao 266003, China

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X52;S917

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    Abstract:

    Crucian carp () vitellogenin (Vtg) is a commonly used biomarker for the detection of estrogenic activity in aquatic environments. In this study, gel filtration combined with ion-exchange chromatography and selective precipitation combined with ion-exchange chromatography were used to purify lipovitellin (Lv) from ovarian homogenates of crucian carp. Lv was identified as a phospholipogly coprotein with an apparent molecular weight of~521 kD and separated into two major polypeptides corresponding to~117 and~103 kD by sodium dodecyl sulfate-polyacrylamide gel electrophoresis. The results of the western blot showed that both anti-goldfish () Lv antibodies had good cross-reaction with crucian carp Lv. Using anti-goldfish Lv antibody, anti-zebrafish Lv antibody, and purified crucian carp Lv, two sandwich enzyme-linked immunosorbent assays (ELISAs) were established. The results showed that the binding curves of goldfish Lv and crucian carp Lv basically overlapped. The sandwich ELISA developed using anti-goldfish Lv antibodies and purified crucian carp Lv had a working range form 15.6 to 1000 ng/mL and a detection limit of 6.8 ng/mL, which was significantly lower than that of the anti-zebrafish Lv antibody-based ELISA and other ELISAs previously reported for crucian carp Vtg. Therefore, we suggest that it is a reliable tool for the quantification of crucian carp Vtg.

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张振忠,马淑伟,郑明驿,王军,汝少国. 鲫卵黄脂磷蛋白的纯化鉴定及其夹心ELISA的建立[J]. Jounal of Fishery Sciences of China, 2018,[volume_no](1):53-59

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  • Online: January 19,2018
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