Abstract:The location of triads within a mammalian skeletal muscle sarcomere has traditionally been defined as 'at the A-I junction'. We attempted to verify this statement by examining systematically the location of triads within the sarcomere over the physiological range of sarcomere lengths. This study was conducted using intact feline muscle fibres from caudofemoralis and exclusively fast-twitch muscle from the hindlimb. Our results intact fibres indicate that the distance between the Z-band and triad (ZT) is relati… Show more
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