Formation of sarcomeres in the embryonic heart of the lobster
Cardiomyoblasts in the myocardium of embryonic lobsters at 3-4 weeks and 6 months of development were examined with the transmission electron microscope in order to describe the events in the formation of sarcomeres in a neurogenic cardiac system. Thick and thin myofilaments appear first in the cell...
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| Veröffentlicht in: | Cell and tissue research 1979-05, Vol.198 (3), p.477-486 |
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| container_end_page | 486 |
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| container_title | Cell and tissue research |
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| creator | Burrage, T.G Sherman, R.G. (Clark Univ., Worcester, Mass. (USA). Dept. of Biology) |
| description | Cardiomyoblasts in the myocardium of embryonic lobsters at 3-4 weeks and 6 months of development were examined with the transmission electron microscope in order to describe the events in the formation of sarcomeres in a neurogenic cardiac system. Thick and thin myofilaments appear first in the cell periphery near the sarcolemma. They align in parallel in a sequential fashion to form consecutive sarcomeric units. Well-defined A and I bands appear before any semblance of a Z line is present. The initial sarcomere is anchored to the sarcolemma by the insertion of thin myofilaments into a region of electron dense material associated intimately with the sarcolemma. Myofibrils grow outward in several planes away from the electron-dense regions of membrane that serve as focal points for myofibril formation. |
| doi_str_mv | 10.1007/BF00234192 |
| format | Article |
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Myofibrils grow outward in several planes away from the electron-dense regions of membrane that serve as focal points for myofibril formation.</description><subject>Animals</subject><subject>Cell Differentiation</subject><subject>Heart - embryology</subject><subject>Myocardium - ultrastructure</subject><subject>Myofibrils - ultrastructure</subject><subject>Nephropidae - embryology</subject><subject>Sarcolemma - ultrastructure</subject><issn>0302-766X</issn><issn>1432-0878</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1979</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNpFkLtPwzAYxC3EqxQWRsSQiQEp8PlRxx4YoGp5qBILSN0sx_lCg5K42OnQ_55UqWA66e6n0-kIuaRwRwGy-6c5AOOCanZARlRwloLK1CEZAQeWZlIuT8lZjN8AVEipT8hxL1KJEXmY-9DYrvJt4ssk2uB8gwFjUrVJt8IEmzxsfVu5ZIU2dDtoZ9c-jx2Gc3JU2jrixV7H5HM--5i-pIv359fp4yJ1HKBLM8vLgtmJcuicQOEoKJXpfqfSOqOMOUDAogCRcSmZ1JTrXOVMA9c8l8DH5GboXQf_s8HYmaaKDuvatug30WRiojWXvAdvB9AFH2PA0qxD1diwNRTM7irzf1UPX-9bN3mDxR86fNPHV0NcWm_sV6iiWc761W8ggP8C3wlpaw</recordid><startdate>19790525</startdate><enddate>19790525</enddate><creator>Burrage, T.G</creator><creator>Sherman, R.G. 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| ispartof | Cell and tissue research, 1979-05, Vol.198 (3), p.477-486 |
| issn | 0302-766X 1432-0878 |
| language | eng |
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| source | MEDLINE; SpringerLink Journals - AutoHoldings |
| subjects | Animals Cell Differentiation Heart - embryology Myocardium - ultrastructure Myofibrils - ultrastructure Nephropidae - embryology Sarcolemma - ultrastructure |
| title | Formation of sarcomeres in the embryonic heart of the lobster |
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