Aggregation-induced emission-active amino acid/berberine hydrogels with enhanced photodynamic antibacterial and anti-biofilm activity

2020 ◽  
pp. 127542
Author(s):  
Yan-Yan Xie ◽  
Yan-Wen Zhang ◽  
Xiao-Zhi Liu ◽  
Xiao-Fang Ma ◽  
Xiao-Tong Qin ◽  
...  
Keyword(s):  
Amino Acid ◽  
Aggregation Induced Emission ◽  
Active Amino Acid

Functional analysis of active amino acid residues of the mercaptosuccinate dioxygenase of Variovorax paradoxus B4

2019 ◽  
Vol 120 ◽  
pp. 61-68 ◽  
Author(s):  
Ulrike Brandt ◽  
Gulsina Galant ◽  
Christina Meinert-Berning ◽  
Alexander Steinbüchel
Keyword(s):  
Functional Analysis ◽  
Amino Acid ◽  
Amino Acid Residues ◽  
Variovorax Paradoxus ◽  
Active Amino Acid

scholarly journals Age-related Regulation of Active Amino Acid Transport in the Ileum of Broiler Chickens

2020 ◽  
Vol 57 (2) ◽  
pp. 131-137
Author(s):  
Mikako Shibata ◽  
Tatsuyuki Takahashi ◽  
Kanari Endo ◽  
Takaharu Kozakai ◽  
Yoshiyuki Azuma ◽  
...  
Keyword(s):  
Amino Acid ◽  
Amino Acid Transport ◽  
Broiler Chickens ◽  
Acid Transport ◽  
Age Related ◽  
Active Amino Acid

pH Rate Profiles of FnY356−R2s (n= 2, 3, 4) inEscherichiacoliRibonucleotide Reductase:  Evidence that Y356Is a Redox-Active Amino Acid along the Radical Propagation Pathway

2006 ◽  
Vol 128 (5) ◽  
pp. 1562-1568 ◽  
Author(s):  
Mohammad R. Seyedsayamdost ◽  
Cyril S. Yee ◽  
Steven Y. Reece ◽  
Daniel G. Nocera ◽  
JoAnne Stubbe
Keyword(s):  
Amino Acid ◽  
Redox Active ◽  
Active Amino Acid ◽  
Radical Propagation

Stability Constants of Some Metal Complexes Formed by Mimosine and Related Compounds

1979 ◽  
Vol 32 (1) ◽  
pp. 21 ◽  
Author(s):  
H Stunzi ◽  
DD Perrin ◽  
T Teitei ◽  
RLN Harris
Keyword(s):  
Amino Acid ◽  
Stability Constants ◽  
Metal Binding ◽  
Acid Group ◽  
Biologically Active ◽  
Amino Acid Group ◽  
Dimeric Complexes ◽  
Major Species ◽  
Active Amino Acid ◽  
Related Compounds

Complex formation of the biologically active amino acid L-mimosine [α-amino-β-(3-hydroxy-4-oxo-1,4-dihydropyridin-1-yl)propanoic acid (1)], mimosinic acid (2), mimosine methyl ether (9) and 3-hydroxy-1-methylpyridin-4(1H)-one (4) with Cu2+, Zn2+, Cd2+ and Pb2+ was studied. Stability constants were determined by potentiometric titration in 0.15M KNOB3 as inert electrolyte at 37�. In the monomeric complexes formed by the mimosine derivatives, metal binding by the hydroxypyridone moiety was favoured relative to the amino acid group. With mimosine, dimeric complexes were major species. Under physiological conditions, mimosine binds copper and zinc ions more strongly than do simpler amino acids.

Alterations in membrane permeability with trypsin treatment

1981 ◽  
Vol 59 (8) ◽  
pp. 668-675 ◽  
Author(s):  
P. A. Johnson ◽  
R. M. Johnstone
Keyword(s):  
Amino Acid ◽  
Membrane Permeability ◽  
Amino Acid Transport ◽  
Acid Transport ◽  
Transport Activity ◽  
Trypsin Treatment ◽  
Trypsin Inhibition ◽  
Active Amino Acid ◽  
Glycine Transport ◽  
Normal Transport

Trypsin treatment of Ehrlich cells reduced sodium-coupled amino acid transport, lowered ATP levels, and abolished cation gradients. The data suggest that the decrease in active amino acid transport results from an alteration in membrane permeability caused by DNA released from a fraction of the cells upon trypsin treatment. The reduced amino acid transport appears to be the result of an abolition of ion gradients required for transport since vesicles prepared from these cells show near normal transport activity. The altered permeability of the membrane can be restored by incubation of the cells with serum. Protein synthesis does not appear to play a role in the restoration of Na+-dependent amino acid transport since restoration is unaffected by the presence of cycloheximide. The recovery of activity does depend partly on the presence of Ca2+ in the incubation medium since reversal of the trypsin inhibition of glycine transport can be obtained on incubation with Ca2+ and glucose.

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