The use of restriction enzymes as a tool for recombining, or joining, different DNA fragments was first illustrated in yet another classic paper, this time by Stanford University researchers Janet Mertz and Ronald Davis (Mertz & Davis, 1972).
Averages for Puerto Vallarta in February. The temperatures are still very warm in Puerto Vallarta, Mexico, in February, even though itâs still winter. Thanks to the cityâs location close to the equator, it enjoys good weather all year round providing the perfect place to head for a winter beach break â it certainly beats the cold European winter.
All of Mexico's beaches get fantastic weather in February. This month offers some of the driest weather of the year along the Caribbean Sea, while the Pacific coast continues to see little rain. Temperatures range from pleasantly warm to moderately hot, depending on how far south you go. CONAGUA.