The ordered square lattices of filaments in the Z-disk and juxtaposed I-band regions proposed by current models of Z-disk structure were compared with those observed by electron microscopy. It was commonly found that there were faults in the lattices of both the Z-disk and I-band regions. Attention is drawn to these faults and the consequences of their presence are discussed in relation to their influence on myofibril size and proliferation.

This content is only available via PDF.