Complex sentence: However, more recent work using similar X-ray diffraction techniques in "Lethocerus" discovered that troponin bridges may play a critical role in stretch activation by moving tropomyosin to activate myosin-actin binding sites.
Split into simpler sentences: However, more recent work using similar X-ray diffraction techniques in "Lethocerus" discovered that troponin bridges may play a critical role in stretch activation. As the muscle is stretched, these bridges move tropomyosin to activate myosin-actin binding sites.