Titin is a large protein that plays a critical role in muscle function, particularly in muscle contraction and elasticity. It is the largest known protein in the human body, spanning half the length of a sarcomere, which is the basic contractile unit of a muscle cell. Research on titin focuses on its structure, function, and its role in various muscle-related diseases such as muscular dystrophy and heart failure. Scientists are investigating how changes in titin expression, mutations, or modifications can affect muscle performance and lead to disease. Additionally, studies are exploring ways to manipulate titin to improve muscle function and potentially develop therapeutic interventions for muscle-related disorders.