Labeling index in response to exogenous BMP2 and LDN193189.

<p>A) Labeling index of blastema mesenchymal cells in blastema slices over a period of five days in culture in the presence or absence of exogenous human BMP2 in amounts as indicated. The number of biological replicates = 4. B) Labeling index of blastema mesenchymal cells in blastema slices over a period of 5 days cultured in 5%FBS and in the presence or absence of LDN193189 in amounts as indicated. The number of biological replicates = 3. Error bars in both A and B represent S.E.M. and P-values were determined by t-test with 2 tails assuming unequal variances.