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4 results for “resilin”
Resilin distribution and abundance in Apis mellifera across biological age classes and castes
<p>The presence of resilin, an elastomeric protein, in insect vein joints provides the flexible, passive deformations that are crucial to flapping flight. This study investigated the resilin gene expression and autofluorescence dynamics among <em>Apis</em> <em>mellifera</em> (honey bee) worker age classes and drone honey bees. Resilin gene expression was determined via ddPCR on whole honey bees and resilin autofluorescence was measured in the 1m-cu, 2m-cu, Cu-V, and Cu2-V joints on the forewing and the Cu-V joint of the hindwing. Resilin gene expression varied significantly with age, with resilin activity being highest in the pupae. Autofluorescence of the 1m-cu and the Cu-V joints on the ventral forewing and the Cu-V joint on the ventral hindwing varied significantly between age classes on the left and right sides of the wing, with the newly emerged honey bees having the highest level of resilin autofluorescence compared to all other groups. The results of this study suggest that resilin gene expression and deposition on the wing is age-dependent and may inform us more about the physiology of aging in honey bees.</p> <p> </p>
Resilin distribution and abundance in Apis mellifera across biological age classes and castes
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Data from: Resilin in the flight apparatus of Odonata (Insecta) – cap tendons and their biomechanical importance for the flight
In Odonata, a direct flight mechanism with specialised tendons evolved. One particular adaptation, the implementation of the rubber-like protein resilin in these cap tendons might be of major importance. Although, resilin was firstly described in one tendon of Odonata, no comprehensive study about the presence of resilin in the thorax exists yet. We investigated various species of Odonata, using µCT, dissection and fluorescence microscopy. Here we show a complete mapping of the odonatan pterothorax, regarding the presence of tendons and their properties. Thus, 20-21 cap tendons in the pterothorax of Odonata show the presence of resilin. While performing outstanding and often aggressive flight manoeuvres, resilin can provide shock absorption against mechanical damage from strong impacts. It may further improve the wear and fatigue resistance due to resilin's damping behaviour. Additionally, resilin in tendons can absorb and return kinetic energy to restore muscles to their original shape after contracting and help maintaining self-oscillation of the flight muscles. Here the material distribution within the direct flight system of Odonata and the biomechanical importance and possible function of resilin is discussed. These results are an important step towards the understanding of the complex form-material-function interplay of the insect cuticle.
Data from: Resilin in the flight apparatus of Odonata (Insecta) – cap tendons and their biomechanical importance for the flight
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