The introduction of acetyl groups
into CS molecular skeleton effectively weakened the strong intra- and intermolecular hydrogen bonding interaction within esterified chitosan.
All those compounds possessed a hydroxyl group at C-1, an acetyl group
at C-2, and a methyl at C-3 in the naphthalene skeleton.
Caption: FIGURE 2: Effect of wood harvesting age on uronic acids (I) and acetyl groups
The acetyl group
at C-2 or C-3 of the xylose residues in the backbone is deacetylated by AXE, with the efficiency of the enzymatic reaction increasing with decreasing length of the xylose backbone (Biely et al., 2013).
The solution containing 5 g/L of the purified xanthan in 5mM trifluoroacetic acid was heated at 100[degrees]C for 1.5 h to remove the pyruvic acetyl groups
Hence, it was thought pertinent to examine whether TAase of mycobacteria utilizing PA(s) as a donor of acetyl group
could be culminating in the acetylation of mycobacterial CYPs.
In African yambean starch, acetylation induced both a decrease and an increase in paste viscosity depending on the percentage of acetyl group
in the starch.
But Sassone-Corsi and his colleagues suspected that sirtuins might be involved because the proteins respond to a cell's energy state by plucking acetyl groups
from histones and other proteins.
Acetylation of proteins by histone acetyl transferases uses acetyl CoA as acetyl group
donor molecule and is the most widely studied acetylation system, while little knowledge is available on acetyl CoA independent acetylation of proteins, although asprin mediated acetylation of cyclo-oxygenase is known for a long time (71).
Ask each acetyl group
to join with an oxaloacetate group.
"The acetyl group
from acetyl-L-carnitine is responsible for production of acetylcholine, an important neurotransmitter for optimal mental functioning.
The carbohydrates, fats, and proteins of food, in the course of their metabolism, all break down to an acetyl group
, also called a two-carbon fragment.
The degree of acetylation (D[S.sub.AC]) was determined from the relative intensities of signals of the acetyl group
at 2.1 ppm and those of all carbohydrate signals in [sup.1]H NMR spectra.
The CS-g-PLLA copolymer prepared by covalent conjugation forms the amide bond which was confirmed by the band at 1,650 [cm.sup.-1] (amide I band, C=0 stretch of acetyl group
) and the band at 1,570 [cm.sup.-1] (amide II band, N--H stretch), respectively, as shown in Fig.
In this study, we synthesized 4 pentapeptides, in which the N-terminal was modified using an acetyl group