Fig. 4.
SR Ca2+ storage undergoes early maturation. Representative [Ca2+]i recordings and integrated Ca2+ response (dashed curve) of myocytes from fetal (A) and adult (B) sheep show response to extracellular Ca2+ removal and addition of 10 μM CPA. C: average of integrated Ca2+ concentration, which is equivalent to Ca2+ content of SR for cells from fetal and adult sheep. Values are means ± SE. No significant difference was observed (P = 0.49 by unpaired t-test).