Abductin is an elastic protein found in scallops, with a Young's modulus of 4.0 × 106 N/m2. It is used as an inner hinge ligament, with a cross-sectional area of 0.78 mm 2 and a relaxed length of 1.0 mm. When the muscles in the shell relax, the shell opens. This increases efficiency as the muscles do not need to exert any force to open the shell, only to close it. If the muscles must exert a force of 1.5 N to keep the shell closed, by how much is the abductin ligament compressed?