Van Noorden S, Ostberg Y, Pearse A G
Cell Tissue Res. 1977 Feb 9;177(2):281-5. doi: 10.1007/BF00221088.
Somatostatin-like immunofluorescence has been found by immunostaining in cells of the bile duct mucosa and pancreatic islet parenchyma of the hagfish, Myxine glutinosa, and the islet lobules of the lamprey, Lampetra fluviatilis.