葡萄糖-1-磷酸酸(1PG/G1P)含量试剂盒

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概述

糖原和淀粉在磷酸解过程中会生成葡萄糖-1-磷酸(1PG/G1P)。本试剂盒提供一种简单,灵敏,快速的测定方法:葡萄糖-1-磷酸(1PG/G1P)在磷酸葡萄糖变位酶和磷酸葡萄糖脱氢酶的相继作用下使 NADP+还原成 NADPH,通过检测 NADPH 在340nm 处的增加量即可计算得出样品中的葡萄糖-1-磷酸(1PG/G1P)含量。

试剂盒组成和配制:

试剂名称 规格 保存要求 备注
提取液 液体 100mL×1 瓶 4℃保存 /
试剂一 粉体 mg×1 支 4℃保存 用前甩几下或离心使试剂落入底  部,再加 1.2mL 蒸馏水溶解备用。
试剂二 粉体 mg×1 支 -20℃保存 用前甩几下或离心使试剂落入底  部,再加 1.2mL 蒸馏水溶解备用。
试剂三 液体 16mL×1 瓶 4℃保存 /
试剂四 粉体 mg×1 支 -20℃保存 用前甩几下或离心使试剂落入底  部,再加 1. 1mL 蒸馏水溶解备用。
标准品 粉剂1支 4℃保存 仅用来鉴定试剂盒中试剂是否正常(不参与结果计算)。使用方法:用前标准管(GIP) 甩几下使粉剂落入底部,再加0.5mL蒸馏水混匀溶解
即浓度为4mg/mL,再稀释4倍成lmg/mL的GIP后备用:按照加样表中的测定管操作

所需的仪器和用品:

酶标仪、96 孔板、台式离心机、可调式移液器、研钵、冰和蒸馏水。

葡萄糖-1-磷酸(1PG/G1P)含量测定:

1 、样本制备

① 组织样本:

建议称取约 0. 1g 组织,加入 1mL 提取液,进行冰浴匀浆。12000rpm, 4℃离心 10min, 取上清,置冰上待测。

【注】:若增加样本量,可以按照组织质量(g):提取液体积(mL)为 1 :5~ 10 的比例提取。

② 细菌/细胞样本:

先收集细菌或细胞到离心管内,离心后弃上清;取约 500 万细菌或细胞加入 1mL

提取液,超声波破碎细菌或细胞(冰浴,功率 200W ,超声 3s ,间隔 10s ,重复 30 次); 12000rpm 4℃离心 10min ,取上清,置冰上待测。

【注】:若增加样本量,可按照细菌/细胞数量(104):提取液(mL)为 500~ 1000:1 的比例进行提取。

③ 液体样本:直接检测。

2 、上机检测:

① 酶标仪预热 30min 以上,调节波长至 340nm。

② 试剂解冻至室温(25℃);

③ 在 96 孔板中按照下表依次加入试剂:

试剂名称 (μL) 测定管 空白管(仅做一次)
试剂一 10 10
试剂二 10 10
试剂三 150 170
样本 20 /
混匀,于室温(25℃) 下孵育 20min 后于 340nm 处读取 A1(若 A 值继续增加,需延长孵育时间,直至 2 分钟内吸光值不变)。
试剂四                10         10                               
混匀,于室温(25℃) 下孵育 20min 后于 340nm 处读取 A2(若 A值继续增加,需延长孵育时间,直至 2 分钟内吸光值不变),△A=(A2-A1)测定-(A2-A1)空白。

【注】1.  若△A 的差值在零附近徘徊,可增加样本量 V1(如增至 50μL ,则试剂三相应减少,保持 总体积不变),或增加样本取样质量 W ,则改变后的 V1 和 W 需代入公式重新计算。

2.  若 A2 值超过 1.2 ,可减少加样量 V1(如减至 10μL ,则试剂三相应增加,保持总体积不变),或对样本用蒸馏水稀释(保持加样体系不变),则改变后的 V1 和 D 需代入公式重新计算。

结果计算:

1 、按样本重量计算:

1PG/G1P  含量(µg/g 鲜重)=[(ΔA÷(ε×d)×V2×106 ×Mr]÷(W×V1÷V)×D=836×ΔA÷W×D

2 、按细胞数量计算:

1PG/G1P 含量(μg/104 cell)=[(ΔA÷(ε×d)×V2×106 ×Mr]÷(500×V1÷V)×D= 1.7×ΔA×D 3 、按照液体体积计算:

1PG/G1P 含量(µg/mL)=[(ΔA÷(ε×d)×V2×106 ×Mr]÷V1=836×ΔA

ε---NADPH 摩尔消光系数,6.22×103 L/mol/cm; d---96 孔板光径,0.5cm;
V---加入提取液体积,1 mL; V1---加入样本体积,0.02mL
V2---反应总体积;0.2mL=2×10-4L; W---样本质量,g;
Mr---葡萄糖-1-磷酸(1PG/G1P)分子量;260; 500---细胞数量,百万;
D---稀释倍数,未稀释即为 1。 /

Glycogen and starch generate glucose-1-phosphate (1PG/G1P) during the process of phosphohydrolysis. This reagent kit provides a simple, sensitive, and rapid determination method: Glucose-1-phosphate (1PG/G1P) is reduced from NADP+to NADPH by the sequential action of phosphoglucose mutase and phosphoglucose dehydrogenase. The content of glucose-1-phosphate (1PG/G1P) in the sample can be calculated by detecting the increase in NADPH at 340nm.
Composition and preparation of reagent kit:

Reagent name Specifications Save requirements Remarks
Extraction solution Liquid 100mL x 1 bottle 4 ℃ storage /
Reagent 1 Powder mg x 1 tube 4 ℃ storage Shake or centrifuge the reagent a few times before use to make it fall to the bottom, then dissolve it in 1.2mL of distilled water for later use.
Reagent 2 Powder mg x 1 tube Store at -20 ℃ Shake or centrifuge the reagent a few times before use to make it fall to the bottom, then dissolve it in 1.2mL of distilled water for later use.
Reagent 3 Liquid 16mL x 1 bottle 4 ℃ storage /
Reagent 4 Powder mg x 1 tube Store at -20 ℃ Shake or centrifuge the reagent a few times before use to make it fall to the bottom, then add 1 Dissolve 1mL of distilled water for later use.
TRC 1 powder 4 ℃ storage Only used to identify whether the reagents in the kit are normal (not involved in result calculation). Usage: Use a pre standard tube (GIP) to shake the powder a few times until it falls to the bottom, then add 0.5mL of distilled water and mix well to dissolve
Dilute GIP with a concentration of 4mg/mL and then dilute it four times to 1mg/mL for later use: follow the instructions in the sample addition table for the measuring tube operation

Required instruments and supplies:

ELISA reader, 96 well plate, desktop centrifuge, adjustable pipette, mortar, ice and distilled water.

Determination of glucose-1-phosphate (1PG/G1P) content:

1. Sample preparation

① Organizational sample:

Suggest weighing around 0 1g of tissue, add 1mL of extraction solution, and homogenize in an ice bath. Centrifuge at 12000rpm, 4 ℃ for 10 minutes, take the supernatant, and place it on ice for testing.

[Note]: If the sample size is increased, it can be extracted in a ratio of tissue mass (g) to extraction solution volume (mL) of 1:5-10.

② Bacterial/cellular samples:

Collect bacteria or cells into a centrifuge tube first, centrifuge and discard the supernatant; Take about 5 million bacteria or cells and add them to 1mL

Extract solution, sonicate bacteria or cells (ice bath, power 200W, sonication for 3s, interval 10s, repeated 30 times); Centrifuge at 12000rpm at 4 ℃ for 10 minutes, take the supernatant, and place it on ice for testing.

[Note]: If the sample size is increased, extraction can be carried out in a ratio of 500-1000:1 of bacteria/cell quantity (104) to extraction solution (mL).

③ Liquid sample: direct detection.

2. Machine testing:

① Preheat the enzyme-linked immunosorbent assay (ELISA) reader for at least 30 minutes and adjust the wavelength to 340nm.

② Thaw the reagent to room temperature (25 ℃);

③ Add reagents to the 96 well plate in the following order according to the table:

② Thaw the reagent to room temperature (25 ℃);

③ Add reagents to the 96 well plate in the following order according to the table:

Reagent name (μL) Measurement tube Blank tube (only done once)
Reagent 1 10 10
Reagent 2 10 10
Reagent 3 150 170
Sample 20 /
Mix well, incubate at room temperature (25 ℃) for 20 minutes, and then read A1 at 340nm (if the A value continues to increase, the incubation time needs to be extended until the absorbance value remains unchanged within 2 minutes).
Reagent 4                  10                                10                                             
Mix well, incubate at room temperature (25 ℃) for 20 minutes, and then read A2 at 340nm (if the A value continues to increase, the incubation time needs to be extended until the absorbance value remains unchanged within 2 minutes). Δ A=(A2-A1) measurement - (A2-A1) blank.

[Note] 1 If the difference in Δ A is hovering around zero, the sample size V1 can be increased (such as increasing to 50 μ L, the three phases of the reagent should be reduced while keeping the total volume unchanged), or the sample sampling mass W can be increased. The changed V1 and W need to be substituted into the formula for recalculation.
If the A2 value exceeds 1.2, the amount of sample added V1 can be reduced (such as to 10 μ L, the three-phase reagent should be increased while keeping the total volume unchanged), or the sample can be diluted with distilled water (keeping the sample addition system unchanged), and the changed V1 and D need to be substituted into the formula for recalculation.
Result calculation:
1. Calculated by sample weight:
1PG/G1P content (µ g/g fresh weight)=[(Δ A ÷ (ε× d) × V2 × 106 × MR] ÷ (W × V1 ÷ V) × D=836 × Δ A ÷ W × D
2. Calculated by the number of cells:
1PG/G1P content (μ g/104 cell)=[(Δ A ÷ (ε× d) × V2 × 106 × MR] ÷ (500 × V1 ÷ V) × D=1.7 × Δ A × D. 3. Calculated by liquid volume:
1PG/G1P content (µ g/mL)=[(Δ A ÷ (ε× d) × V2 × 106 × Mr] ÷ V1=836 × Δ A

ε---NADPH Molar extinction coefficient,6.22×103 L/mol/cm; d---96 Orifice plate optical diameter,0.5cm;
V---Add volume of extraction solution,1 mL; V1---Add sample volume,0.02mL
V2---Total reaction volume;0.2mL=2×10-4L; W---Sample quality,g;
Mr---Glucose-1-phosphate(1PG/G1P)Molecular weight;260; 500---Number of cells, in millions;
D---Dilution ratio,Undiluted is 1。 /

规格

英文名称
Glucose-1-Phosphate (1PG/G1P)Content kit
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