Adenylyl cyclase-associated protein; Capulet (capt) encodes a conserved actin binding protein that functions across eukaryotes to negatively regulate actin filament assembly. Different types of actin filament formation are differentially affected by the loss of capt.

Actin-42A; Actins are highly conserved proteins that are involved in various types of cell motility and are ubiquitously expressed in all eukaryotic cells.

Actin-87E; Actins are highly conserved proteins that are involved in various types of cell motility and are ubiquitously expressed in all eukaryotic cells; Belongs to the actin family.

Glutaredoxin domain-containing cysteine-rich protein CG31559; Electron transfer activity; protein disulfide oxidoreductase activity. It is involved in the biological process described with: cell redox homeostasis; Belongs to the GRXCR1 family.

Flightin (fln) encodes an indirect flight muscle specific protein, not expressed in other muscle types. It is required for the correct assembly of the myosin thick filament during flight muscle development in pupae. fln null mutants cannot fly and show a progressive flight muscle loss as adults. This loss is most likely caused by uncontrolled hypercontraction.

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.

Troponin C at 41C (TpnC41C) is expressed predominantly in the pupal and adult tubular muscles, with minor amounts in the flight muscle. The encoded protein binds calcium to regulate muscle contraction. Its absence in tubular muscle is compensated by up-regulation of the product of TpnC4.

Troponin C isoform 4 (TpnC4) encodes a calcium-binding subunit in the troponin complex of flight muscle. Together with the other troponin subunits, it activates the muscle when it is stretched, leading to rapid oscillatory contractions.

Stretchin-Mlck, isoform U; Stretchin-Mlck (Strn-Mlck) encodes a complex locus producing many large protein isoforms, which likely regulate cytoskeletal dynamics in muscles. A shorter isoform is specifically expressed in indirect flight muscle, localizes to the thick filament and is required to prevent flight muscle hypercontraction. Strn-Mlck mutants cannot fly and show flight muscle atrophy.