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.
Long-distance walks. Every year, over the course of the spring and summer, we complete a long-distance walk across Yorkshire. But don't worry, we don't do it all in one go! Normally, we split it into a series of day walks, and we do one of them every month.