On Joanna's Vintage Decor Shop. I started a local boutique and partnered with Chip to implement the Magnolia style in the homes he was flipping, Joanna says. We later branched out and started renovations in the central Texas area.. From: Chip Gaines and Joanna Gaines.
Figure Detail. The use of restriction enzymes as a way to cut DNA molecules was first demonstrated in a classic study by Johns Hopkins biochemist Daniel Nathans and his graduate student Kathleen Danna (Danna & Nathans, 1971).igure Detail. The use of restriction enzymes as a way to cut DNA molecules was first demonstrated in a classic study by Johns Hopkins biochemist Daniel Nathans and his graduate student Kathleen Danna (Danna & Nathans, 1971).
The efficiency with which a restriction enzyme cuts its recognition sequence at different locations in a piece of DNA can vary 10 to 50-fold. This is apparently due to influences of sequences bordering the recognition site, which perhaps can either enhance or inhibit enzyme binding or activity. A related situation is seen when restriction recognition sites are located at or very close to the ends of linear fragments of DNA.