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Abstract
This article describes a set of protocols—for retrofitting, transformation and purification—that together enable the delivery of full-sized YAC-DNA to plant cells. To be able to equip YACs of interest with plant selectable markers, we have constructed a retrofitting vector that carriesnptII anduidA. Furthermore, we established a transformation protocol for plant protoplasts that is sufficiently efficient to support transfer of high-molecular-weight DNA. In this protocol lipofection is combined with PEG-mediated direct gene transfer. Large amounts of purified DNA are necessary for lipofection. To obtain sufficient quantities of concentrated, purified YAC-DNA, we used an optimized two-step, gel-purification method. Transient expression of a YAC-bornuidA demonstrates that both retrofitting vector and transformation protocol are effective.
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