A4781
Asialofetuin from fetal calf serum
Type I (Sigma designation)
Sinónimos:
Asialofetuin
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About This Item
Productos recomendados
biological source
bovine (calf) serum
Quality Level
type
Type I (Sigma designation)
form
powder
impurities
salt, essentially free
≤0.5% N-acetylneuraminic acid
solubility
0.85% sodium chloride: soluble 1 mg/mL
storage temp.
2-8°C
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General description
Asialofetuin is a glycoprotein with three asparagine-linked triantennary complex carbohydrate chains and terminal N-acetylgalactosamine residues.
Application
Asialofetuin from fetal calf serum has been used:
- to quantitate the plant Ricin toxin′s B subunit (RTB) lectin activity in β-phaseolin signal peptide (P)–proinsulin gene (INS)–RTB plants by enzyme-linked immunosorbent assay (ELISA)
- quantitate VP7:RTB fusion protein in transformed potato tissues by ELISA
- as a glycoprotein substrate to measure the receptor-binding activity of recombinant RTB and NSP490–RTB fusion proteins
- to study the nature of the interaction between ferritin and the placenta
Incorporation of asialofetuin (AF) in liposomes strongly enhance delivery to and endocytosis by cells displaying the AF receptor, notably hepatocytes. This provides a very efficient route for gene therapy.
Biochem/physiol Actions
Asialofetuin exhibits affinity to asialoglycoprotein receptor (ASGP-R) on hepatocytes and uses the receptor to enter the cell. This property allows asialofetuin to be used as a ligand to deliver drugs to hepatocytes and as a competitive inhibitor to ASGP-R.
Preparation Note
Prepared by a modification of Spiro, R.G., J. Biol. Chem., 235, 2860 (1960).
Storage Class
11 - Combustible Solids
wgk_germany
WGK 3
flash_point_f
Not applicable
flash_point_c
Not applicable
ppe
Eyeshields, Gloves, type N95 (US)
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R D Lamparelli et al.
British journal of haematology, 72(1), 100-105 (1989-05-01)
The organ distribution of intravenously injected hepatic ferritin either labelled with 59Fe or with 59Fe and 125I, was studied in pregnant guinea-pigs. At 5 h 71.2% of injected 59Fe was present in the placenta and fetus. Transfer of 59Fe to
Keiichi Motoyama et al.
Journal of drug delivery, 2011, 476137-476137 (2011-04-15)
The purpose of this study is to evaluate in vitro gene delivery mediated by asialofetuin-appended cationic liposomes (AF-liposomes) associating cyclodextrins (CyD/AF-liposomes) as a hepatocyte-selective nonviral vector. Of various CyDs, AF-liposomes associated with plasmid DNA (pDNA) and γ-cyclodextrin (γ-CyD) (pDNA/γ-CyD/AF-liposomes) showed
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Identification and sequence determination by mass spectrometry have become routine analyses for soluble proteins. Membrane proteins, however, remain challenging targets due to their hydrophobicity and poor annotation. In particular small membrane proteins often remain unnoticed as they are largely inaccessible
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The SDS-glycoprotein system is mimic of membrane protein-lipid system. Fate of glycoprotein, conformation and the interactive forces involved in membrane milieu are expected to be decided by the net charge on glycoprotein that may change during acidic environment in a
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