This is known as enzyme digestion. On double stranded DNA the recognition sequence is on both strands, but runs in opposite directions. This allows the enzyme to cut both strands. Sometimes the cut is blunt, sometimes the cut is uneven with dangling nucleotides on one of the two strands.
Yet warm weather is a year round occurrence in San Diego. A day of 80 degrees can happen in any month but December. San Diego's nights are equally mild with an average of just ten nights a year when the thermometer doesnt drop below 70 degrees. Days per month in San Diego of at least 60, 70 or 80 Â°F.
Weather in San Diego in September. The average maximum daytime temperature in San Diego in September is a warm 26Â°C (79Â°F) with low heat & humidity. There are usually 9 hours of bright sunshine each day, which represents 70% of the 12 hours of daylight. The average sea temperature in and around San Diego in September is 20Â°C (68Â°F). Expect 4mm (0.2 inches) of rainfall across the whole of September with 1 day with some rain falling. Maximum UV levels will be very high (8 UV index) at midday when the skies are clear.