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.
* Updated Thursday, February 22, 2018 12:05:06 am Puerto Vallarta time - Weather by CustomWeather, Â© 2018 14 day forecast, day-by-day Hour-by-hour forecast for next week Yesterday's weather