Paramyosin, long form; Paramyosin (Prm) encodes a muscle protein found only in invertebrates. It dimerizes into a coiled-coil that occupies the interior of the thick filament. Its role is thought to be structural, although it can be phosphorylated and this is important for muscle function.

Troponin T, skeletal muscle; Upheld (up) encodes the striated muscle protein Troponin T. Troponins T, C and I form a regulatory complex with Tropomyosin that is found at regular intervals along the thin (F-actin) filaments of the muscle sarcomere.

Z band alternatively spliced PDZ-motif protein 52 (Zasp52) encodes a member of the Zasp protein family. It is a scaffold protein that binds the product of Actn and localizes to muscle attachment sites and Z-discs in muscle cells, as well as localizing cortically in non-muscle cells. It plays a role in muscle development, especially in myofibril assembly.

Myosin heavy chain (Mhc) encodes the motor protein that provides the force for muscle contraction through its ATP-dependent interaction with actin filaments. It functions with essential and regulatory light chains.

Myosin light chain alkali; Microfilament motor activity; calcium ion binding. It is involved in the biological process described with: muscle contraction; mesoderm development.

Parvin, isoform A; Parvin (parvin) encodes a Calponin-homology protein that, together with the products of Ilk and stck, reinforces integrin-matrix adhesion at muscle attachment sites in the developing embryo. The product of parvin contributes to cell adhesion and actin cytoskeleton organisation in muscles, wing and eye epithelial cells.

Tropomyosin-2; Tropomyosin, in association with the troponin complex, plays a central role in the calcium dependent regulation of muscle contraction. May also regulate motor systems required to maintain nuclear integrity and apico-basal polarity during embryogenesis.

Titin; Key component in the assembly and functioning of adult and embryonic striated muscles and muscle tendons. By providing connections at the level of individual microfilaments, it contributes to the fine balance of forces between the two halves of the sarcomere. The size and extensibility of the cross-links are the main determinants of sarcomere extensibility properties of muscle. In non-muscle cells, seems to play a role in chromosome condensation and chromosome segregation during mitosis. Might link the lamina network to chromatin or nuclear actin, or both during interphase.

Dystrophin, isoforms A/C/F/G/H; Required for the maintenance of appropriate synaptic retrograde communication and the stabilization of muscle cell architecture or physiology. Both det and Dg are required for maintenance of early dpp signaling in the presumptive crossvein. Isoform A is not required to maintain muscle integrity, but plays a role in neuromuscular homeostasis by regulating neurotransmitter release. May play a role in anchoring the cytoskeleton to the plasma membrane.