Figure 2.

Calcium transients are suppressed significantly when myocardium is cultured with ventral pharynx. (a) The average calcium transients produced in myocardium that was cultured for 24 hours, alone or in the presence of ventral pharynx with and without anti–FGF-2-neutralizing Ab. Also shown are typical calcium transients elicited from myocardial strips derived from a single heart tube cultured alone (b), in the presence of ventral pharynx (c), or in the presence of ventral pharynx and anti–FGF-2-neutralizing Ab (d). The effect of ventral pharynx on development of myocardial calcium transients was significant (P < 0.05).