结论转染反义端粒酶RNA在封闭细胞端粒酶活性表达的同时，伴发P21与P16表达水平的升高。
Conclusion Antisense telomerase RNA can block telomerase activity in SMMC7721 cells accompanied simultaneously with an increased P16 and P21 expression levels.
他们先把细菌封闭在凝胶内，这样，这些单细胞的细菌就会在没有水分的条件下清除盐结晶层，因为没有水分的参与，也就不会损坏壁画。
The scientists trap the bacteria in a gel.This way, the single-celled cleaning crew can destroy the salt layer with no moisture penetrating the murals.
小分子核糖核酸可以用来封闭人体细胞，使之免受致病病毒的侵扰，或者使病毒丧失侵入细胞的能力。
MicroRNAs could be used to seal off human cells from disease-causing viruses, or to disable viruses that gain entry.
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