the results are interpreted as indicating that the sulphated glycosaminoglycans , chondroitin/chondroitin sulphate and heparan sulphate , are present in the form of proteoglycan in the neuroepithelial basement membrane and elsewhere in the cranial region of day 9/day 10 rat embryos , and that they have a morphogenetic function during cranial neurulation .
C0017973
glycosaminoglycans
C0019143
heparan