Fig. 2.
Expression of Tg fb2 and Tg fb3 in wildtype embryonic hearts. In situ hybridization (B, C, E, F, H, I, K–O) and cardiac α-actin antibody HHF35 (A, D, G) or α-smooth muscle actin antibody 1A4 (J). A: primitive atrium; Ao: ascending aorta; AoS: aortic sac; AoV: aortic valve; AVC: AV cushion; CM: condensed mesenchyme; DAo: dorsal aorta; LA: left atrium; OT: outflow tract; PT: pulmonary trunk; PV: pulmonary valve; RV: right ventricle; V: primitive ventricle. Bars: A–L, 100 nm; M–O, 200 nm.