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Functions
Resilin is a protein of Arthropod cuticle. Mainly, resilin is present in insect legs and wings joints, however, it may be in parts of proboscis. The protein is involved in effective energy storage and has several functions. Resilin allows insects to increase efficacy of leg and wing work. Then, resilin location pattern influences the pattern of wing folding.

Applications
The properties of resilin became an object of interest for other fields. For example, in biomedical engineering, resilin was used to create resilin-like polypeptide (RLP) that have enhanced biological characteristics of resilin. RLPs were used to create new PEG hydrogel with facilitated photocrosslinking characteristics and compatibility with cells both in adhesion and mechanical properties. RLPs are used in regenerative scaffolds for applications for cartilage (particularly, interbertebral discs ), muscles, vascular tissue, vocal fold regeneration. Additionally, resilin can be combined with silk in a composite that obtains both remarkable elasticity of resilin and strength of silk. Resilin also one of three materials that belong to biorubbers. As biomimetic protein, resilin molecular properties were used in  rec1-resilin and its conjugates with gold nanoparticles for novel research in biosensors.