TY - GEN AU - Hagopian,M AU - Spiro,D TI - Derivation of the Z line in the embryonic chick heart SN - 0021-9525 PY - 1970///0403 KW - Animals KW - Chick Embryo KW - Heart KW - embryology KW - Microscopy, Electron KW - Myocardium KW - cytology KW - Myofibrils N1 - Publication Type: Journal Article UR - https://doi.org/10.1083/jcb.44.3.683 ER -