【正文】
Once a suitable anism is found, conventional breeding and mutagenesis methods are used where possible to induce geic changes that may produce even more of the desired product. 一旦篩選到了合適的生物體,就盡可能地應(yīng)用傳統(tǒng)育種及誘變方法來使生物體發(fā)生遺傳變化,從而產(chǎn)生更多的目標(biāo)產(chǎn)物。 Thus, totally new capabilities can be engineered and microanisms in particular and plant and animal cells to a lesser extent may be made to produce substances beyond their naturally endowed geic capabilities 通過這種方法就可以設(shè)計(jì)出全新的性能,并且 ,可以主要應(yīng)用微生物和相對較少的動植物細(xì)胞來生產(chǎn)某些物質(zhì),它們的性質(zhì)是那些本來正常 遺傳所不具備的。 Thus, resistance to viral infection and increased geic stability may be incorporated into anisms that lack them, the formation of harmful byproducts can be reduced or eliminated and objectionable odours, colours or slime products can be removed 這樣,對那些遺傳穩(wěn)定性不高,易遭受 病毒感染的生物體來說,就可以提高抵抗力和穩(wěn)定性,同時,有害副產(chǎn)品的形成 也可以減少或消除 ,并且,那些具有 令人討厭的顏色、氣味或粘質(zhì)的產(chǎn)品也可以除掉。 A successful industrial culture should ultimately exhibit most or all of the following characteristics: it should be a pure culture。 be geically stable。 be easily propagated。 exhibit rapid growth characteristics。 have good rate of product formation。 be free of toxic byproducts。 and be amenable to geic manipulation. 成功的工業(yè)培養(yǎng)生物(菌種)應(yīng)該基本具備以下全部或大部分 性質(zhì):它應(yīng)該是純品,能 穩(wěn)定遺傳,容易繁殖,生 長迅速,產(chǎn)率高,不含有毒副產(chǎn)品,并且能受遺傳