cleavage fragment 中文意思是什麼
cleavage fragment
解釋
解理塊-
This strain ' s virulence was judged by mean death time of chick embryos ( mdt ), intracerebral pathogenicity index in day - old chicks ( icpi ) and intravenous pathogenicity index in 6 - week - old chickens ( ivpi ) and it was found to be the virulent strain. at last, it was tested by the recurrent infection and found that it was the newcastle disease virus ( ndv ), and it was named hbg - 1 strain. in order to find the difference of the cleavage site of this strain with f48e9 and ? 30 strain, a part of the cleavage site of fusion protein gene fragment was amplified by rt - pcr using a primer and sequenced. the sequence analysis showed this strain had low homology with f4ge9 and cso. a phylogenetic tree based on the published sequences of ndv reference strains was constructed and showed the isolated strain hbg - 1 belonged to the genotype w ndv, a novel genotype ndv
為了進一步探尋分離株與標準株的異同，又採用rt - pcr方法，擴增獲得分離株f _ o裂解位點附近的基因片段，經測序后與國際上已發表的新城疫病毒的核酸序列進行比較，結果表明其與標準株和疫苗株之間的同源性較低，僅為82 86之間。經系統發育進化樹分析后，判定該分離株為新城疫病毒（ ndv ）基因型。運用計算機軟體對其裂解位點處的氨基酸序列進行預測和分析，結果表明該分離株為新城疫病毒強毒株並具有基因型的典型結構特徵。 -
A dna fragment of 348 - bp amplified from the b subunit gene was cut into two dna fragment of 216 and 132 - bp by haelli. endonuclease restriction analysis of the plasmid content with psti showed that strainas with the same result of southern - blot with spesific probe had the different cleavage pattern. the isolated 285 - bpand 348 - bp dna was ligated with plasmid puc18. the ligation mixture was used to transform e. coli jm109and the transformants were plated on lb agar containing antibiotics. plasmid dna containing cloned genes were used for direct sequencing
提示1999年的疫情由不同的病原菌引起。另外使用針對志賀毒素2及其變種的引物對進行pcr檢測、細菌染色體pst和pcr產物的hae 、 ras酶切分析，以及pcr產物的序列分析，發現2000年從江蘇省徐州市患者和家畜家禽糞便標本分離的大腸桿菌o157 ： h7菌株僅僅攜帶slt2vha基因。 -
A reverse - transcriptase polymerase chain reaction ( rt - pcr ) based technique was developed to detect newcastle disease virus ( ndv ) of different poultry species origin. four oligonucleotide primers, based on the differences of nucleotide sequence at the cleavage site of fusion ( f ) protein gene between virulent and non - virulent strains of apmv - 1, were designed to amplify specific dna fragment from different viruses
依據apmv - 1融合蛋白（ f ）基因裂解位點的核苷酸序列與其毒力的相關規律，分別設計合成了四條寡核苷酸引物，建立了一個可迅速檢測不同禽源apmv - 1並可鑒定強、弱毒株的逆轉錄酶?聚合酶鏈式反應（ rt - pcr ）技術。
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