Tahara T, Maeda Y, Kuroiwa A, Ueno K, Obinata M, Natori S
Biochem J. 1982 Jun 1;203(3):571-5. doi: 10.1042/bj2030571.
Storage-protein mRNA was found to be abundant in poly(A)-containing RNA extracted from the fat-body of third-instar larvae of Sarcophaga peregrina (fleshfly). This RNA sedimented at the position of 19S on sucrose-density-gradient centrifugation and the product of its translation in vitro was 75K protein (protein of mol.wt. 75 000), which was precipitated specifically with antibody against storage protein. This product was suggested to contain a signal sequence that is missing in mature storage protein. The poly(A)-containing RNA was also found to contain much of another mRNA coding for 25K protein (protein of mol.wt. 25 000), but the function of this protein is unknown.
在棕尾别麻蝇(肉蝇)三龄幼虫脂肪体中提取的含多聚腺苷酸(poly(A))的RNA中,发现储存蛋白mRNA含量丰富。该RNA在蔗糖密度梯度离心中沉降于19S位置,其体外翻译产物是75K蛋白(分子量为75000的蛋白),该蛋白能被抗储存蛋白抗体特异性沉淀。推测该产物含有成熟储存蛋白中缺失的信号序列。还发现含poly(A)的RNA中含有大量另一种编码25K蛋白(分子量为25000的蛋白)的mRNA,但该蛋白的功能未知。