A-I junction

The A-I junction is the junction between the A and I bands of the sarcomere, which is the smallest unit of a muscle fiber. In skeletal muscle, the T tubule, an extension of the skeletal muscle plasma membrane, is located here.[1]

References

  1. ↑ di Fiore, Mariano SH; Eroschenko, Victor P (2008). Di Fiore's Atlas of histology: with functional correlations. Philadelphia: Wolters Kluwer Health/Lippincott Williams & Wilkins. p. 124. ISBN 0-7817-7057-2.


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