These indicated that the porcine il - 6 gene was correctly transcribed and translated in the recombinant bacteria . the fusion protein was recovered from polyacrylamid gel and used to immunize the rabbit , and the liter of rabbit anti - porcine il - 6 serum from immunized rabbit was 1 : 128 , 000 從制備性聚丙烯酰胺凝膠中回收融合蛋白,用mtt法測(cè)定重組蛋白刺激小鼠脾淋巴母細(xì)胞增殖反應(yīng)活性,并以重組蛋白免疫家兔制備抗豬il - 6滴度為128 , 000的高免兔血清。
The results were found that the specific 670bp dna bases of cgh was detected by rt - pcr in the recombinant bacteria and a new protein band was found in sds - page with molecular mass of about 50 kda which is consisted of a 23 . 6 kda protein deduced from the cgh gene sequence and gst ( 26 kda ) Rt - pcr分析確證重組質(zhì)粒在大腸桿菌中能正確轉(zhuǎn)錄; sds - page分析證明誘導(dǎo)重組質(zhì)粒表達(dá)了融合蛋白,分子量約為50kd ,與預(yù)期的26kd的gst帶和23 . 6kd的草魚(yú)生長(zhǎng)激素基因編碼蛋白質(zhì)構(gòu)成的融合蛋白大小一致。
The mrna and protein expression were assayed by rt - pcr and sds - page . the results were found that the specific 740bp dna bases of il - 6 was detected by rt - pcr in the recombinant bacteria and a new protein band was found in sds - page with molecular mass of about 49 kda which is consisted of a 23 kda protein deduced from the il - 6 gene sequence and gst ( 26 kda ) 以iptg誘導(dǎo)融合蛋白表達(dá),經(jīng)rt - pcr檢測(cè)發(fā)現(xiàn)740bp的特異性il - 6條帶;通過(guò)sds - page分析,在49kd處出現(xiàn)gst ? pil6融合蛋白條帶,其表達(dá)量占總細(xì)菌蛋白量的30 ,證明豬il - 6基因得到了正確轉(zhuǎn)錄和表達(dá)。
The expression conditions of e2 gene in p . pastoris were optimized , the results indicated that the peak obtained after 72 hours ; pattern of inhibition / induction could improve expression level ; the best ph value were between 7 . 5 and 8 . 0 and the optimized methanol - induced concentration was 2 % - 3 % the e2 genes of the prevalent strain ( guangxi yulin strain ) and c strain derived from rabbit spleen tissue were amplified and cloned into e . coli the expression vector pproex - htb respectively , the recombinant plasmids pproex - gxyl and pproex - c were obtained and then were transformed into the dh5a e . coli competent bacteria respectively , the recombinant bacteria could express the major antigen region of e2 gene , the expression yields amount to 35 % and 38 % repectively 豬瘟病毒ez基因的原核表達(dá): pcr擴(kuò)增出當(dāng)前豬瘟流行野毒株,中國(guó)豬瘟兔化弱毒( c株)兔脾組織毒ez基因的主要抗原區(qū),將其克隆到原核大腸桿菌表達(dá)載體pproex htb中誘導(dǎo)表達(dá),經(jīng)sds page檢測(cè)表明,重組質(zhì)粒能表達(dá)ez基因主要區(qū)蛋白, westernblot檢測(cè)表明,誘導(dǎo)表達(dá)蛋白與豬瘟陽(yáng)性血清發(fā)生特異性反應(yīng),表達(dá)量為35和38 ,可用于基因工程診斷抗原。