At the junction of B-and Z-DNA one pair of bases is flipped out from normal bonding.

At each junction, installation of a new monarch tended to mean a break-up of the union for a while.

At the junction with Joachimstaler Straße it passes the Café Kranzler, successor of the Café des Westens, a famous venue for artists and bohémiens of the pre-World-War-I era.

At the junction between the inner and outer baileys, on the north side of the castle stood a tall five-sided keep, the eastern parts of which has been pulled down.

At the nerve ending in the neuromuscular junction, where the impulse is transferred to the muscle cell, the nerve impulse leads to the transfer of vesicles with the neurotransmitter acetylcholine to " active zones " in the presynaptic membrane, where it is released into the synaptic cleft and stimulates the acetylcholine receptor on the muscle.

At junction 5 near Sevenoaks, drivers continuing around the M25 in either direction must follow the slip roads.

At the junction of a p-type and an n-type semiconductor there forms a region called the depletion zone which blocks current conduction from the n-type region to the p-type region, but allows current to conduct from the p-type region to the n-type region.

At the junction of the bell and the uterus there is a second small opening situated dorsally.

At Warwick, the canal rises by two locks to Budbrooke Junction ( formerly the junction with the then-independent Warwick and Birmingham Canal ).

At the strategically important junction of the two arms of the Old Rhine stands the old castle de Burcht, a circular tower built on an earthen mound.

At the junction of umbilical cord and placenta, the umbilical arteries branch radially to form chorionic arteries.

At the cementoenamel junction, the cementum is acellular due to its lack of cellular components, and this acellular type covers at least ⅔ of the root.

At that junction, the highway turns southeast and changes designation to Autoroute 85 for, and then downgrades to Route 185 until the New Brunswick border.

At the curve ( The Durango Curve ) southwest of downtown, between the 19th Avenue and Buckeye Road interchanges, it picks up the designation Maricopa Freeway all the way to the southern terminus at the second Interstate 10 junction.

At this junction, I-37 once again runs concurrently with US 281 which had been concurrent with I-410.

At the junction of Randlesdown Road and Bromley Road there is a bus stop aptly named Bellingham Road stop ( so called due to its position at the junction of Randlesdown Road, Bromley Road and Bellingham Road ).

At the junction of the High Street and Parchmore Road, on a site previously called Walker's Green, stands the Clocktower, which was built in 1900, financed partly by public subscription.

At the southern end of Tulse Hill is a major road junction between the A204 ( Tulse Hill ), A205 ( South Circular ) and the A215 ( Norwood Road ).

At the junction with CR 645, the route turns to the northeast and enters Estell Manor, becoming Broad Street.

At the junction of these trails, the Forest House hotel and trading post was built.

At first the settlement at the junction of the railroads was called Tom Paine's Post Office.

At the junction, U. S. 24 turns north and runs concurrently with U. S. 281.

At an early date the place was called Menominee River Junction, because here was the junction between the main line, and the Menominee River Branch.

At her door, two or three hours later, Mary Jane whispered, `` Everyone is asleep ''.

At the end of this period two pious Christians in Rome receive the revelation which leads them to seek the next Pope on the rock.

At two thirty he sent Fujimoto to the top of the wall at the northeast corner of the mission to keep an eye on the ridge road and give a signal when he first glimpsed the approach of Kayabashi's party.

At 7:25 two hotel doormen came thumping down the steps, carrying a saw-horse to be set up as a barricade in front of the haberdashery store window next to the entranceway, and as I watched them in their gaudy red coats that nearly scraped the ground, their golden, fringed epaulets and spic, red-visored caps, I suddenly saw just over their shoulders Jessica gracefully making her way through the crowd.

At the age of 17 he became an apprentice machinist at the shop of Walcott & Harris in Valley Falls, Rhode Island, and following two or three other jobs in quick succession after graduation, he went into business for himself in 1831, making lathes and small tools.

At a very shallow place, two Mexicans rushed into the open for a shot.

At this moment, Loveless and Means arrived, crashing through the undergrowth with their horses, and distracted her, and she ran off a short distance and jumped into a crevice between two rocks.

At Jenks Street, Simms said, the car skidded completely around, just missed two parked cars, and sped east in Jenks.

At least two private colleges in the Atlanta area now or in the past have had integrated student bodies, but their tax-exempt status never has been challenged by the state.

At one extreme are the systems of upper New York State, where libraries in two or more counties combine to serve a large, sparsely populated area.

Those elegant `` At Home '' cards she sent out, now she could wear her pretty clothes again, and had the house all trimmed up, hadn't brought many callers in two whole months.

At two that morning, he was still walking -- up and down Peony, up and down the veranda, up and down the silent, moonlit beach.

At pH values between the two pKa values, the zwitterion predominates, but coexists in dynamic equilibrium with small amounts of net negative and net positive ions.

At the exact midpoint between the two pKa values, the trace amount of net negative and trace of net positive ions exactly balance, so that average net charge of all forms present is zero.

At one end of the shank there are two arms, carrying the flukes, while the stock is mounted to the other end, at ninety degrees to the arms.

At the time both South African and South American plants were placed in the same genus ; subsequently they were separated into two different genera.

At last, led to the Hippodrome of Constantinople, he was hung up by the feet between two pillars, and two Latin soldiers competed as to whose sword would penetrate his body more deeply, and finally his body, according to the representation of his death, was torn apart.

At no great distance east of this rift-valley is Mount Kilimanjaro-with its two peaks Kibo and Mawenzi, the latter being, and the culminating point of the whole continent — and Mount Kenya, which is.

At the end of day two, Apollo 16 was about away from Earth.

At that point, scientists began to reconsider their pre-mission hypothesis that Descartes had been the setting of ancient volcanic activity, as the two astronauts had yet to find any volcanic material.

At speaker meetings one or two members tell their stories, while discussion meetings allocate the most time for general discussion.

At some moment a price difference exists, and the problem is to execute two or three balancing transactions while the difference persists ( that is, before the other arbitrageurs act ).

At least two of the cellphone calls made by passengers indicate that all the hijackers they saw were wearing red bandanas, which some have questioned may have signified an allegiance to the Egyptian Islamic Jihad.

At least two of the cellphone calls made by passengers indicate that all the hijackers they saw were wearing red bandanas, which some believe may have signified an allegiance to the Egyptian Islamic Jihad.