d-isomer

D-Cysteine 是一种大肠杆菌生长的有力抑制剂，是半胱氨酸的 D 型异构体。它由 D-氨基酸氧化酶介导产生 H2S，是一种对抗小脑共济失调的神经保护剂。 D-半胱氨酸可以抑制由变形链球菌和链球菌血红蛋白形成的两种生物膜的生长和致龋性。

Dihydroartemisinin (mixture of α and β isomers) 是一种有用的有机化合物，可用于生命科学领域的相关研究。其产品编号为 T64399，CAS号为 131175-87-6。

(R)-Naroparcil 是 Naroparcil 的异构体。 Naroparcil 是一种4-甲基伞形酮基 β-D-木糖苷类似物，与血管平滑肌细胞增殖有关，在 Wessler 淤滞模型中抑制血栓的形成。

D-Mannopyranose 是一种己糖或可发酵单糖，是甘露糖、水曲柳和相关植物的葡萄糖异构体。

D-Arginine (D-精氨酸) 是L-Arginine的 D 型异构体和非活性形式。D-Arginine是内源性代谢物和EC 4.1.1.19 (arginine decarboxylase, 精氨酸脱羧酶)的抑制剂，对微生物具有广谱毒性并且可作为微生物亚群的调节剂。

(R)-pyrrolidine-2-carboxylic acid (D-Proline) 是天然氨基酸 L -脯氨酸的异构体。D -氨基酸在人类血浆和唾液中含量相对较高。这些氨基酸可能是细菌来源，但也有证据表明它们是通过氨基酸消旋酶活性内源性产生的。

NMDA (N-Methyl-D-aspartic acid) 是一种氨基酸，作为 D-异构体，是谷氨酸受体的 NMDA 受体亚型的定义激动剂。

D-Lysine(D-赖氨酸)是L-Lysine的 D 型异构体，可通过L-赖氨酸的化学消旋和微生物不对称降解制备。D-Lysine可减少放射性标记肽在肾脏的摄取，降低肾毒性。

D-Tyrosine，是酪氨酸的D异构体，通过抑制酪氨酸酶活性，作为黑色素合成的负向调节剂。此外，D-Tyrosine还能抑制生物膜的形成，并诱导生物膜的自我分散，同时不影响细菌的生长。

D-(-)-Lactic acid sodium (Sodium D-lactate) 是一种微生物代谢产物，作为一种手性分子，常用于糖酵解等相关研究 ，其中 L-异构体在生物体中最常见。

ZINC77292789 (Fmoc-Thr[GalNAc(Ac)3-α-D]-OH) 是制备基于三聚体 MUC1 免疫显性基序抗原的候选抗癌疫苗的起始材料，可制备含有 βGalNAc-​Thr 作为 Tn 抗原异构体的合成 MUC1 糖肽，可诱导针对肿瘤细胞的抗体产生。

trans-Doxercalciferol is an isomer of Doxercalciferol. Doxercalciferol is an activator of the Vitamin D receptor and prevents renal disease.

Fmoc-Gly-Gly-D-Phe-OtBu, an ADC cleavable linker, is utilized in the synthesis of antibody-drug conjugates. It is the R-isomer of Fmoc-Gly-Gly-Phe-OtBu [1].

24, 25-Dihydroxy VD2 (24,25-Dihydroxy vitamin D2) 是维生素 D2 的 代谢产物，是维生素 D在体内存在25 羟维生素 D 的异构体。

D-methionine sulfoxide hydrochloride, the D-isomer of methionine sulfoxide hydrochloride, is the oxidation product of methionine. Methionine is a restrictive amino acid in milk or legume proteins and is easily oxidized during storage.

(2R)-Octyl-α-hydroxyglutarate ((2R)-Octyl-2-HG) is a D-isomer 2-Hydroxyglutarate modified form.

L-Glucose-1-14C is the L-isomer of glucose. It also is the enantiomer of the more common D-glucose.

(-)-L-threo-PDMP is an enhancer of ganglioside biosynthesis. The (-)-L-threo-PDMP (1S,2S) isomer is the active stimulatory component of DL-threo-PDMP in contrast to (+)-D-threo-PDMP , which is an inhibitor of glucosylceramide synthetase. (-)-L-threo-PDMP upregulates GM3, GD3, and GQ1b synthase levels, which are glycosyltransferases involved in ganglioside biosynthesis, and increases ganglioside levels in cells. It increases neurite outgrowth and synapse formation in vitro and improves retention of a long-term memory learned prior to forebrain ischemia in rats when administered following ischemia at a dose of 40 mg/kg per day.

Sphinganine (d20:0) is a natural isomer of dihydro-D-erythro-sphinganine (sphinganine (d18:0); that is a precursor of ceramide and sphingosine as well as a substrate for sphingosine kinases, which generate sphingosine-1-phosphate (d18:1) . In S. cerevisiae, the amount of sphinganine (d20:0) increases 10.8-fold in response to heat stress, indicating it is involved in heat stress adaptation. Sphinganine levels increase significantly in response to certain mycotoxins, including fumonisins as well as in some cancers. Sphinganine can block protein kinase C activation in some cases but not others.

Ins(1,4,5)P3 is an isomer of the biologically important D-myo-inositol-1,4,5-triphosphate. Unlike its isomer, Ins(1,4,5)P3 does not evoke a rise in intracellular calcium when added to cells. It is not known if Ins(1,4,5)P3 can act as a competitive inhibitor of biologically-active inositol phosphates.

Palmitoyl-D-carnitine is a long-chain acylcarnitine, an isomer of palmitoyl-L-carnitine , and the D enantiomer of palmitoyl-DL-carnitine . It inhibits carnitine palmitoyltransferase with a Ki value of 2.1 mM for 14C-palmitoylcarnitine synthesis by erythrocyte membranes.

UDP-β-D-Glucose is the stereoisomer of UDP-α-D-glucose (sodium salt) . The activities of the UDP-β-D-glucose isomer are not known.

D,L-erythro-PDMP, an erythro isomer of PDMP, exhibits growth inhibition on cultured rabbit skin fibroblasts. Additionally, this compound serves as an effective inhibitor of UDP-glucose: ceramide glucosyltransferase.

D-Tagatose (D-(-)-Tagatose) 是自然界中发现的一种罕见的单糖，具有益生元特性。它是研究II 型糖尿病的潜在抗糖尿病药物，也是帮助提升结肠有益细菌、预防结肠癌和抑制胆固醇的益生元。它是蔗糖的替代品，也是口香糖、果汁和饮料等食品中的低热量甜味剂。