The long chains of amino acids fold to give each type of protein molecule a specific shape. The particular shape that a protein molecule has allows other molecules to fit into it. This is particularly important for antibodies and enzymes.
Introduction: The Wolds Way National Trail is a long distance footpath that follows a natural chalk escarpment which runs from Hull to Filey. At just over 76 miles long the walk crosses beautiful East Yorkshire countryside.
In addition to the above distances, two new long distance events have appeared, the 111 and 222 events. The 111 distance is 1 km (0.62 mi) swimming, 100 km (62 mi) bicycling and 10 km (6.2 mi) running, totalling 111 km (69 mi).