The occurrence of uridine diphosphate N-acetylgalactosamine 6-sulfate in quail egg white and characteristic distribution of sulfated sugar nucleotides in different avian eggs

31P-NMR characterization of hen egg yolk and egg white

The avian egg is an isolated system where embryonic development can easily be studied. Furthermore, the system can be subjected to various environmental constraints. Its size is such that it can easily be accommodated in most NMR instruments. This is demonstrated by a recent 31P-NMR surface coil experiment where the increase of embryo size and development could be judged by the levels of ATP and phosphocreatine (Belton, P.S., Gordon, R.E., Jones, J.M. and Shaw, D. (1983) Br. Poult. Sci. 24, 429-433).

The common identity of UDP-N-acetylgalactosamine 4-sulfatase, nitrocatechol sulfatase (arylsulfatase), and chondroitin 4-sulfatase

Evidence is presented indicating that three sulfatase activities towards UDP-N-acetylgalactosamine 4-sulfate, nitrocatechol sulfate, and chondroitin 4-sulfate are functions of the same hen oviduct enzyme. Using chondroitin [35S]sulfate from chick embryo cartilage, it is shown that hydrolysis of ester sulfate by this enzyme is limited to 4-sulfate groups occurring in the non-reducing terminal N-acetylgalactosamine 4-sulfate and N-acetylgalactosamine 4,6-bissulfate residues.