[Structural elements of z-disks].
Structural features of the Z-line were examined in negative stained rabbit psoas myofibrils. The data obtained allow to conclude that: 1) the amount of overlap of actin-containing filaments from apposing sarcomeres is about 50 nm; 2) there are five bands of extra density separated by the distances approximately 20 nm across entire Z-line width, and three central of these bands are localized in the actin overlap region; 3) the axial repeating distance between Z-filament attachment sites on thin filament is found to be 17-20 nm. A model for the array of cross-bridges between action-containing filaments in Z-line is presented.
Tskhovrebova
L A
LA
D000185:Actinin / Q000648:ultrastructure; D000199:Actins / Q000648:ultrastructure; D000818:Animals; D046911:Macromolecular Substances; D008854:Microscopy, Electron; D009132:Muscles / Q000648:ultrastructure*; D009210:Myofibrils / Q000648:ultrastructure*; D011817:Rabbits
D000199:Actins; D046911:Macromolecular Substances; D000185:Actinin
Strukturnye élementy z-diskov.