Z line
noun
: any of the dark thin bands across a striated muscle fiber that mark the junction of actin filaments in adjacent sarcomeres
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Trains on the 2, 3, A, C, J and Z lines were running at lower speeds in the area.
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Joe Ruiz Jr., CBS News, 18 Apr. 2023
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Joe Ruiz Jr., CBS News, 18 Apr. 2023
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“Z line.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/Z%20line. Accessed 15 Dec. 2024.
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