1. The distribution of sialic acid in the eggs of original Silky fowl was investigated. The sialic acid contents of the yolk, albumen and the chalaza of a single egg were 205.2, 11.96 and 0.83 mg, respectively. 2. The sialic acid content of the yolk of Silky eggs was 11.5-fold higher than that of a conventional domestic fowl yolk. 3. Sialic acid isolated from Silky yolk was entirely N-acetylneu...

Newly hatched juveniles of the Hawaiian squid Euprymna scolopes rapidly become colonized by the bioluminescent marine bacterium Vibrio fischeri. Motility is required to establish the symbiotic colonization, but the role of chemotaxis is unknown. In this study we analyzed chemotaxis of V. fischeri to a number of potential attractants. The bacterium migrated toward serine and most sugars tested. ...

The catabolism of Tay-Sachs ganglioside, N-acetylgalactosaminyl- (N-acetylneuraminosyl) -galactosylglucosylceramide, has been studied in lysosomal preparations from normal human brain and brain obtained at biopsy from Tay-Sachs patients. Utilizing Tay-Sachs ganglioside labeled with (14)C in the N-acetylgalactosaminyl portion or (3)H in the N-acetylneuraminosyl portion, the catabolism of Tay-Sac...

It was previously shown that reductive alkali treatment of purified human cervical mucin releases a heterogeneous population of reduced neutral, sialylated, and sulfated oligosaccharides (Yurewicz, E. C., and Moghissi, K. S. (1981) J. Biol. Chem. 256, 11895-11904). Four major sialylated oligosaccharide fractions were isolated with approximate compositions of Fuc:GlcNac:Gal:NeuAc:N-acetylgalacto...

Abbreviations: BC: Bladder Cancer; MIBC: Muscle-Invasive BC; NMIBC: Nonmuscle-Invasive BC; BPH: Benign Prostatic Hyperplasia; CT: Computed Tomography; CEA: Carcinoembryonic Antigen; CA19-9: Carbohydrate-Antigen 19-9; HCC: Hepatocellular Carcinoma; TCC: Transitional Cell Carcinoma; UC: Urotherial Carcinoma; Hex: Hexose; Man: D-mannose; Gal: D-galactose; HexNAc: N-acetylhexsosamine; GlcNAc: N-ace...

The validity of measuring vaginal sialidase activity to identify bacterial vaginosis (BV) was determined by using 5-bromo-4-chloro-3-indolyl-alpha-D-N-acetylneuraminic acid in a near-patient test. The sensitivity and specificity of the test for prediction of BV were 95.6 and 96.3%, respectively. Positive and negative predictive values were 95.6 and 96.3%, respectively. This test may be an alter...

Introduction Sialic acid (N-acetylneuraminic acid, NeuAc, Neu5Ac) is an essential terminal sugar on the glycan moieties of many functional and structural human glycoproteins. A key intermediate in the biochemical process to form sialic acid is the monosaccharide, ManNAc, which is formed by the bifunctional enzyme UDPN-acetylglucosamine / Nacetylmannosamine epimerase kinase (GNE). ManNAc is an i...

AIM To investigate the bactericidal effects of calcium chelated N-acetylneuraminic acid-glycomacropeptide (CaG-NANA) against Helicobacter pylori (H. pylori). METHODS For manufacture of CaG-NANA, calcium (Ca) was combined with glycomacropeptide (GMP) by chelating, and N-acetylneuraminic acid (NANA) was produced with Ca-GMP substrate by an enzymatic method. The final concentration of each compo...

Ban, Yuriko, and Lawrence J. Rizzolo. Differential regulation of tight junction permeability during development of the retinal pigment epithelium. Am J Physiol Cell Physiol 279: C744–C750, 2000.—The retinal pigment epithelium (RPE) is an epithelial region of the blood-brain barrier. During embryogenesis, permeability of the barrier gradually decreases. A culture model of RPE development reveale...