Fig1Ec of [doi:10.1083/jcb.200601014] Copyright: This image is from Weinert S; Bergmann N; Luo X; Erdmann B; Gotthardt M "M line-deficient titin causes cardiac lethality through impaired maturation of the sarcomere." J Cell Biol 2006 173(4): 559-70 [PMID:16702235] , and is displayed under the terms of the Creative Commons Attribution-Noncommercial-Share Alike 3.0 Unported License