ISSN:
1615-6102
Keywords:
Amphibian epidermis
;
Metamorphosis
;
Osmoregulation
;
Plasma membrane
;
Glycoprotein
;
Lectin
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Summary A cytochemical and biochemical study of galactose (Gal) and N-acetyl-glucosamine (GlcNAc) containing glycoproteins of the anuran amphibian epidermis during development has been carried out. In premetamorphic tadpoles, theGriffonia simplicifolia II lectin (GS II, specific for N-acetyl glucosamine) bound to a glycoprotein of 49 kDa in the plasma membrane of all the epidermal strata showing a basal-to-apical binding gradient. During metamorphic climax GS II labeling was progressively polarized to the outermost plasma membrane. In epidermis from juveniles and adults the staining was observed mainly in a 52 kDa band.Griffonia simplicifolia I lectin (GS I, specific for galactose) also bound to a glycoprotein of about 49 kDa in tadpoles and 52 kDa in frogs. Furthermore, a GS I labeling in bands of about 110–150 kDa appears during metamorphosis. After this process, a definitive pattern of lectin staining and K+-stimulated, ouabain-sensitive p-nitrophenyl phosphatase activity is established.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01379371
