產(chǎn)品概述
胰島素是由胰島β細(xì)胞受內(nèi)源性或外源性物質(zhì)如葡萄糖、乳糖、核糖、精氨酸、胰高血糖素等的刺激而分泌的一種蛋白質(zhì)激素。由A、B鏈組成,共含51個(gè)氨基酸殘基。能增強(qiáng)細(xì)胞對(duì)葡萄糖的攝取利用,對(duì)蛋白質(zhì)及脂質(zhì)代謝有促進(jìn)合成的作用。胰島素是機(jī)體內(nèi)唯一降低血糖的激素,也是唯一同時(shí)促進(jìn)糖原、脂肪、蛋白質(zhì)合成的激素。
產(chǎn)品原理
本實(shí)驗(yàn)采用雙抗體夾心ELISA法??勾笫驣nsulin單抗包被于酶標(biāo)板上,同時(shí)加入標(biāo)本、標(biāo)準(zhǔn)品和生物素化的抗大鼠Insulin抗體,標(biāo)本、標(biāo)準(zhǔn)品中的Insulin會(huì)與加入于孔中的生物素化的抗大鼠Insulin抗體及包被于酶標(biāo)板上的單抗結(jié)合,形成免疫復(fù)合物,游離的成分被洗去;加入辣根過氧化物酶標(biāo)記的親合素,親合素與生物素特異性結(jié)合,游離的成分被洗去。加入顯色底物(顯色劑),若反應(yīng)孔中有Insulin,辣根過氧化物酶會(huì)使無色的顯色劑變藍(lán),加終止液變黃。在450nm處測OD值,Insulin濃度與OD450值之間呈正相關(guān),可通過繪制標(biāo)準(zhǔn)曲線求出標(biāo)本中Insulin濃度。
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