indirect immunofluorescence studies using specific antibodies against collagen or procollagen types i , ii , iii , and iv demonstrated that undifferentiated neural crest cells , melanocytes and neuron-like cells stained only with antibody to type iii procollagen , while fibroblastic cells present in some cultures stained only with antibody to type i procollagen .
C0007634
cells
C0016030
fibroblastic cells