Non-histone chromatin protein fractions associated with ‘active’ chromatin in embryonic chicken liver

1985 ◽  
Vol 65 (2) ◽  
pp. 131-141
Author(s):  
Barbara Siemieniako ◽  
Ewa M. Rakowicz-Szulczyńska ◽  
Antoni Horst
Keyword(s):  
Protein Fractions ◽  
Chicken Liver ◽  
Chromatin Protein ◽  
Active Chromatin ◽  
Embryonic Chicken

scholarly journals Comparative rates of transfer of N-acetylneuraminic acid to acceptors bearing one or more Gal(β 1-4)GlcNAc terminus by the Gal(β 1-4)GlcNAc(NeuAc-Gal) (α 2-6)-sialyltransferase from embryonic chicken liver. Utilization of oligosaccharides as acceptors in sialyltransferase assays

1983 ◽  
Vol 213 (1) ◽  
pp. 253-260 ◽  
Author(s):  
B Bendiak ◽  
G M W Cook
Keyword(s):  
Relative Orientation ◽  
Chicken Liver ◽  
Acid Glycoprotein ◽  
Acetylneuraminic Acid ◽  
Embryonic Chicken ◽  
Acid Protein ◽  
Marked Preference ◽  
Km Value ◽  
Glcnac Termini

Using a number of branched and unbranched oligosaccharides, glycoproteins and artificial glycoproteins bearing Gal(beta 1-4)GlcNAc-R termini as acceptors (where R represents H, oligosaccharide, oligosaccharide-protein or fatty acid-protein), the comparative rates of transfer of NeuAc by the Gal(beta 1-4)GlcNAc(NeuAc-Gal) (alpha 2-6)-sialyltransferase of embryonic chicken liver were determined. Acceptor substrates were utilized at levels approximating physiological, near the Km value of the best acceptor, desialylated alpha 1 acid glycoprotein. The sialyltransferase has a marked preference for multi-branched acceptors. From the specificity data, it is concluded that the enzyme binds at least two Gal(beta 1-4)GlcNAc termini of an acceptor molecule, and that the relative orientation of the branches is an important factor determining the rate of catalysis by the enzyme. The use of oligosaccharides as acceptors to study sialyltransferase catalyses is emphasized. Results are discussed in the context of the mode of assembly of sialoside termini of known glycoprotein structures in vivo.

Estrogen-mediated induction of a vitellogenin-specific nonhistone chromatin protein in the male chicken liver

1985 ◽  
Vol 201 (2) ◽  
pp. 252-257 ◽  
Author(s):  
Tatsuo Nakayama ◽  
Maki Irikura ◽  
Yoshiko Setoguchi ◽  
Masami Nakayama ◽  
Mitsuyoshi Mochizuki ◽  
...  
Keyword(s):  
Chicken Liver ◽  
Chromatin Protein ◽  
Male Chicken
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