title: Development of fiber types in human fetal muscle. An immunocytochemical study.
abstract: Human fetal muscles have been studied using immunocytochemical methods with antibodies directed against different myosin isoforms. We show that fiber type differences can be detected as early as 15-16 weeks of gestation. At this time it would appear that both the heavy and light chains characteristic of slow myosin are found in some myotubes.
mesh_terms: D000251:Adenosine Triphosphatases / Q000378:metabolism; D006801:Humans; D007124:Immunoenzyme Techniques; D009132:Muscles / Q000166:cytology / Q000196:embryology* / Q000378:metabolism; D009218:Myosins / Q000378:metabolism*
chemical_list: D000251:Adenosine Triphosphatases; D009218:Myosins