Xylose is a kind of pentose; its molecular formula is C 5 H 10 O 5 and its structural formula is shown in Fig. 6.2. Hemicellulose is a polysaccharide of d-xylose in nature. The industrial production of xylose has been gradually maturing. Xylose is often used as a food sweetener and is the source of xylitol.

Feb 1, 2025 · Xylose, the second most abundant component of second-generation biomass, presents tremendous opportunities for sustainable biomanufacturing. [54] However, the atomic economy of xylose for producing C3 chemicals is much lower than glucose. This limitation can be addressed by coupling xylose with third-generation biomass C1 compounds.

Xylose is metabolized primarily through three distinct pathways: (i) the isomerase pathway, (ii) the oxidoreductase pathway, and (iii) the oxidative pathway. The xylose metabolic network is depicted in Fig. 1 (Domingues et al., 2021). The isomerase pathway is typically utilized by prokaryotes, such as E. coli, Bacillus sp., and Lactobacillus sp ...

Aug 1, 2019 · The RE end segment turns into xylose and dehydrated xylose I5, and the NR end segment converts into dehydrated xylose I10, xylose, d-xylose and five-membered intermediate I2. The activation free energy of Reaction 5' is the highest among these reactions, indicating the hydrolysis is very difficult at fast pyrolysis condition.

Jun 1, 2021 · A typical xylose rich hydrolysate composition, as given in Table 3, is generated from different biomass types such as corn fiber, soy hulls, and bagasse (that are rich in xylose) in either a single-stage /two-stage hydrolysis [10], [11] to first extract arabinose and then xylose. To this hydrolysate, a boron reagent (e.g., PBA – phenylboronic ...

May 1, 2024 · Lu et al. [17] investigated the continuous conversion of xylose to furfural in water using SO 2− 4 /γ-Al 2 O 3 and HND-580 as mixed solid acid catalysts. Gong et al. [18] proposed a reaction pathway for the preparation of furfural by co-catalytic dehydration of xylose with SO 2 − 4 /SnO 2-SSXR and ChCl-MAA. Among them, the catalysts were ...

Jun 1, 2019 · Besides xylose assimilation, the activation of native cell metabolism to boost xylose utilization remains as a big challenge during yeast engineering [25]. Among these pathways, Dahms or X-1-P/R-1-P pathway has the significant stoichiometric advantage regarding the synthesis of the C2 chemicals, due to directly cleave C5 molecules ( Figure 1 ...

Nov 24, 2020 · Xylose is the second most abundant sugar in lignocellulosic biomass [1].Therefore, metabolic engineering of fermenting microorganisms for efficient and rapid xylose utilization has been undertaken to achieve economic bioconversion of lignocellulosic biomass into value-added products.

Oct 1, 2024 · Further experiments using 13 C-labeled xylose should be conducted to confirm xylose uptake and metabolization, or to understand the xylose concentration decrease within the cultivation medium. A. protothecoides was the only candidate able to metabolize the three carbon sources when provided together and efficient growth was observed, lasting 2 ...

Jan 1, 2025 · For xylose induction systems, both XlnR- and XylR-based single-mode systems showed a steep response in the range of 0.1–1 m M xylose, indicating good cooperativity (n xlnR = 2.0; n xylR = 3.7); besides, their EC50 are both approximately 1 m M, while the arabinose biosensors required an order of magnitude greater amount of inducer for half ...