Sport touring motorcycle Sport touring motorcycle A sport touring motorcycle (sometime a "sports-tourer") is a type of motorcycle that combines the performance of a sport bike with the long-distance capabilities and comfort of a touring motorcycle. The first sport-tourer is said to be the fully faired 1977 BMW R100RS. Journalist Peter Egan defines the sport-tourer as a "café racer that doesn't hurt your wrists and a touring bike that doesn't feel like a tank," and identified the R100RS as the first example he owned. Unlike a sport model, a sport touring model will typically have more wind protection with larger fairings and an
Beta-propeller least one case, ions have been shown to increase stability by binding deep in the central tunnel of the beta-propeller. Murzin proposed a geometric model to describe the structural principles of the beta propeller. According to this model the seven bladed propeller was the most favored arrangement in geometric terms. Despite its highly conserved nature, beta-propellers are well known for their plasticity. Beyond having a variety of allowed beta-sheets per domain, it can also accommodate other domains into its beta-sheets. Additionally, there are proteins that have shown variance in the number of beta-strands per beta-sheet. Rather than having the typical