Because of their small size, primer-dimers usually melt at lower temperatures than the. desired product. Additionally, nonspeciï¬c ampliï¬cation may. result in PCR products that melt at temperatures above or. below that of the desired product.
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Animals have also provided us with glue. This discovery would have probably come quite easily once we had started cooking meat. After all the nutrient parts of an animal were eaten, the remaining bones and tendons could be cooked at high temperature until a melted substance was created.