we have found that many of the dopa-positive cells identified as melanoblasts by some researchers are actually not derived from the neural crest : dopa-positive cells in t. torosa were identified in the transmission electron microscope to be either leukocytes or erythrocytes , in x. laevis dopa-positive cells are found between the ectoderm and somites where neural crest cells are not found , and x. laevis embryos surgically depleted of neural crest have dopa-staining patterns identical to control embryos .
C0815004
neural crest cells
C0027789
neural crest