CHICKEN CARDIAC MUSCLE

Chicken Cardiac Muscle

Selective comparative investigations into the uhrastructure of cardiac muscle have yielded m u c h information regarding the existence in cardiac muscle of a n u m b e r of discrete subcellular components that are common to the hearts of most, if not all, of a variety of different vertebrates.

CHICKEN CARDIAC MUSCLE Its Elusive Extended Junctional Sarcoplasmie Reticulum and Sarcoplasmic Reticulum Fenestrations

Immunoelectron microscopic studies of desmin (skeletin) localization and intermediate filament organization in chicken cardiac muscle

We studied the localization of desmin (skeletin), the major subunit of muscle-type intermediate filaments, by high resolution immunoelectron microscopy in adult chicken skeletal muscle. Immunoferritin labeling of ultrathin frozen sections of intact fixed sartorius muscle showed the presence of desmin between adjacent Z-bands and as strands peripheral to Z-bands, forming apparent connections bet...

Ultrastructure of chicken cardiac muscle as studied by double immunolabeling in electron microscopy.

The ultrastructural localization of alpha-actinin and vinculin in chicken cardiac muscle was studied by double indirect immunoelectron microscopy, using ferritin and iron-dextran (Imposil) as the electron-dense markers conjugated to the secondary antibodies, on ultrathin frozen sections of fixed tissue. Fixation and immunolabeling procedures were developed that permitted maximal retention of th...

Cardiac Muscle

1. Cardiac muscle is a striated muscle, with a sarcomere structure much like that of skeletal muscle. It has small cells (as in smooth muscle), firmly connected end-to-end at the intercalated disks. 2. The action potential in cardiac muscle is long lasting compared to the duration of the contraction, preventing a tetanic contraction. 3. Under normal circumstances, cardiac muscle operates at len...