基因敲入所面临的主要难题是修复模板的制备和如何与Cas9-sgRNA核糖核蛋白复合物共导入至细胞。虽然单链DNA（ssDNA）修复模板展示出了优于双链DNA（dsDNA）模板的众多优势，但是其制备难度和制备费用都有很大的挑战性，因而限制了长单链DNA（long ssDNA）模板的 ...

Single-stranded DNA (ssDNA) viruses are economically important pathogens of plants and animals, and are widespread in oceans; yet, the diversity and evolutionary relationships among marine ssDNA ...