B – dystrophin is part of a group of a protein complex that works together to strengthen muscle fibres and protect them from injury as muscles contract and relax. Dystrophin is produced by the DMD gene and mutations cause Duchenne and Becker muscular dystrophies, which lead to reduced amounts of dystrophin in skeletal muscle cells. This reduced amount of dystrophin causes muscles to weaken and damage over time, causing the build up of fat rather than muscle. This pseudohypertrophy causes the appearance of enlarged muscle, namely in the calf muscles, in those with Duchene muscular dystrophy.
A – molecules of fibrillin-1 bind to each other and to other proteins to form threadlike filaments called microfibrils. Microfibrils form elastic fibres,
A – molecules of fibrillin-1 bind to each other and to other proteins to form threadlike filaments called microfibrils. Microfibrils form elastic fibres,