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qinjysdu金蟲(chóng) (小有名氣)
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[交流]
【求助/交流】請(qǐng)教達(dá)人:想找出兩個(gè)細(xì)菌中差異表達(dá)的基因,有什么成熟且便宜的方法?
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| 現(xiàn)有兩株細(xì)菌,暫命名為1和2,其中2對(duì)于某種抗逆環(huán)境具有更高的抵抗力,現(xiàn)在想找出在這種環(huán)境下兩個(gè)菌株差異表達(dá)的基因,不知有什么辦法?其中菌1已經(jīng)完成了基因組測(cè)序,菌2未測(cè)序,由于經(jīng)費(fèi)有限,不太可能采用全基因組芯片方法,請(qǐng)教各位達(dá)人,有什么既便宜又比較成熟的方法?不勝感激! |
» 搶金幣啦!回帖就可以得到:
+4/228
+1/168
+1/88
+1/78
+1/71
+2/58
+1/36
+1/35
+2/34
+5/20
+1/16
+1/12
+1/12
+1/10
+1/9
+1/7
+1/5
+1/4
+1/1
+1/1
金蟲(chóng) (小有名氣)
鐵桿木蟲(chóng) (著名寫(xiě)手)
金蟲(chóng) (正式寫(xiě)手)
金蟲(chóng) (正式寫(xiě)手)
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Non-radioactive RNA fingerprint procedure First strand cDNA synthesis was performed with 15 mg of total RNA, 500 pmol oligo(dT)18 and 800U Superscript II reverse transcriptase (Life Technologies) in a volume of 100ml RT buffer, following the manufacturer’s instructions. After heat inactivation of reverse transcriptase and RNase A digestion, reaction products were purified from excess oligonucleotides by using a QIAquick kit (Qiagen). cDNA derived from 75 ng of total RNA was used as template for PCR. Amplification was performed in 20 ml of PCR buffer (10mM Tris-Cl pH 8.3, 50mM KCl, 1.5mM MgCl2) with 125mM dNTPs (Pharmacia) and 1mM each primer. For each reaction, two 18-mer oligonucleotides, of arbitrary sequence and a GC content of 61%, were used. Sequences of all 131 oligonucleotides used in this screen can be obtained upon request. All PCR amplifications were performed on an Omni-Gene thermal cycler (Hybaid). After 2 min of denaturation at 948C, 2 units of Taq DNA polymerase (Roche) were added (manual ‘hot start’). After 1 min at 948C, the profile was started with two, low-stringency cycles (948C for 1.5 min, 508C for 3.5 min and 728C for 3 min) followed by 35–40 high-stringency cycles (948C for 1 min, 658C for 1 min, and 728C for 1 min), and a final 5 min extension at 728C. Reaction products were separated on 2% SeaKem LE agarose gels (FMC) for 3.5 h at 6– 7Vcm21 and 88C. Gel and running buffer was 0.5X TBE (50mM Tris-borate pH 7.9, 1mM Na2-EDTA) containing 5mgml21 ethidium bromide. Bands of interest were excised, DNA was eluted with a Jetsorb kit (Genomed) and the amplicons were cloned directly by using a Topo TA cloning kit (Invitrogen). 這種方法比較的原始,應(yīng)該比較的便宜 |
金蟲(chóng) (小有名氣)
金蟲(chóng) (小有名氣)
金蟲(chóng) (小有名氣)
鐵桿木蟲(chóng) (知名作家)
木蟲(chóng)之王 (文壇精英)
金蟲(chóng) (小有名氣)
金蟲(chóng) (小有名氣)
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不能個(gè)確定的話 這個(gè)差異只能是外在表現(xiàn)型....多看看相關(guān)文章,國(guó)內(nèi)做的很多事國(guó)外已經(jīng)做過(guò)的,不難查到資料,你可以一那些資料為基礎(chǔ)來(lái)找,不外乎設(shè)計(jì)引物擴(kuò)增預(yù)測(cè)目的片段,測(cè)序比較差異,這是最簡(jiǎn)單的了....嗯還有 中文文獻(xiàn)可信度比較低,看個(gè)理論就行了,想得到可靠的數(shù)據(jù)還是看外文吧... |
榮譽(yù)版主 (文壇精英)
榮譽(yù)版主 (文壇精英)
金蟲(chóng) (小有名氣)
金蟲(chóng) (正式寫(xiě)手)
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差減雜交:http://202.204.208.83/yichuanxue/wlkc/ckzl/uyju/09.htm 我真暈,樓主要學(xué)會(huì)使用搜索引擎才好 |
木蟲(chóng) (著名寫(xiě)手)
榮譽(yù)版主 (文壇精英)
榮譽(yù)版主 (文壇精英)
榮譽(yù)版主 (文壇精英)
鐵桿木蟲(chóng) (著名寫(xiě)手)
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