Difference between "a" and "i" bands, Biology




A-Band (Anisotropic band)


I-Band (Isotropic band)


It has wide H-zone.


It has thin Z-line.


It gives dark appearance and hence also


It gives light appearance hence also called




called dark band.


It contains myosin filaments and parts of




light band.


It contains part of actin filaments.


actin filaments.




Its length remains unchanged during


It shortens during muscle contraction.


muscle contraction.



Posted Date: 10/1/2012 3:53:45 AM | Location : United States

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