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Pepsinogen I (PG I)

产品参数

Anti- PG I antibody (Datasheet)

Source Mouse monoclonal antibody,cultured in vitro
Platforms Immunofluorescence, Chemiluminescence, Colloidal gold and Immunological latex turbidimetry
Catalog number K50f4 K56t1
Applications Capture Detection
Buffer 1x PBS
Purity Purity>98%,purified by Protein A/G chromatography
Storage instructions Upon delivery aliquot and store at -20°C. Avoid freeze / thaw cycles.
产品参数

PG I protein (Datasheet)

Description PG I protein (41.1kD) with His-tag, cultured in vitro
Applications Calibrator and quality control product
Catalog number K3916
Source Mammalian cell
Purity >90% as analysized by SDS-PAGE
Buffer 1 x PBS,pH 7.4
Storage instructions Store at 2 - 8°C (35.6 – 46.4°F) for up to 3 years.
Sequence IMYKVPLIRK KSLRRTLSER GLLKDFLKKH NLNPARKYFP QWEAPTLVDE QPLENYLDME YFGTIGIGTP AQDFTVVFDT GSSNLWVPSV YCSSLACTNH NRFNPEDSST YQSTSETVSI TYGTGSMTGI LGYDTVQVGG ISDTNQIFGL SETEPGSFLY YAPFDGILGL AYPSISSSGA TPVFDNIWNQ GLVSQDLFSV YLSADDQSGS VVIFGGIDSS YYTGSLNWVP VTVEGYWQIT VDSITMNGEA IACAEGCQAI VDTGTSLLTG PTSPIANIQS DIGASENSDG DMVVSCSAIS SLPDIVFTIN GVQYPVPPSA YILQSEGSCI SGFQGMNLPT ESGELWILGD VFIRQYFTVF DRANNQVGLA PVAHHHHHH
SDS-PAGE 胃蛋白酶原Ⅰ(PGⅠ)抗原SDS-PAGE与western blot图
Product Information

Antibody Product Information

Antibody Evaluation (Immunofluorescence-based)

Immunofluorescence-Based test strip was prepared with K50f4-K56t1 antibody (30 Abbott calibrators, Concentration: 5-200 ng/ml, R2 >97%)
免疫荧光平台样本符合率Fig. 1 Clinical sample analysis
Accuracy
The quality control samples with concentration of 25 ng/ml-30 ng/ml and 70 ng/ml-80 ng/ml respectively were required to repeat test three times. B= (M-T) / T×100% (B: Relative Standard Deviation, M: Average, T: Concentration)
Sample
(ng/ml)
Test 1 Test 2 Test 3 Average
(ng/ml)
RSD Standard
Batch 1 26.59 23.54 25.78 28.43 25.92 -2.53% ±15%
78.34 77.23 75.98 79.12 77.44 -1.14%
Batch 2 26.59 25.22 24.27 25.8 25.10 -5.62%
78.34 79.69 78.94 75.34 77.99 -0.45%
Batch 3 26.59 27.89 27.94 27.2 27.68 4.09%
78.34 75.29 77.38 76.62 76.43 -2.44%
Repeatability
The quality control samples with concentration of 25 ng/ml-30 ng/ml and 70 ng/ml-80 ng/ml respectively were required to repeat test over 10 times. CV= (S /average) ×100% (CV < 15% as indicated in the following table)
Low Value
(26.59ng/ml)
High Value
(78.34ng/ml)
Test 1 27.12 82.01
Test 2 25.15 82.02
Test 3 27.98 76.40
Test 4 26.74 80.58
Test 5 29.18 75.67
Test 6 28.41 81.85
Test 7 24.24 81.94
Test 8 28.62 81.64
Test 9 27.70 85.61
Test 10 26.78 73.28
Average (ng/ml) 27.19 80.10
SD 1.55 3.75
CV 5.70% 4.68%
Standard ±15%

Antibody Evaluation (Immunological Turbidimetry)

校准曲线Fig. 2 Calibration curve
R1: Buffer
R2: Combination of K50f4-K56t1 matched pair antibody and latex particals
Sample: PG I calibrator
Equipment: Hitachi 7080

Linear range

Linear dependence > 99% with concentration between 0-200 ng/ml.
Theoretical value (ng/ml) Measured value 1 Measured value 2 Average
0.00 2.1 3.54 2.82
25.00 29.22 27.02 28.12
50.00 55.8 52.8 54.3
100.00 108.25 107.36 107.805
200.00 208.76 206.74 207.75
PGⅠ抗体线性范围

Fig. 3 Linearity range

Antibody Evaluation (Immunological Turbidimetry)

PGⅠ免疫比浊平台临床对比数据Fig. 4 Calibration curve
R1: Latex particals
R2: K50f4-K56t1 matched pair antibody
Sample: PG I calibrator
Equipment: Hitachi 7080
Clinical Significance

Description

胃蛋白酶原Ⅰ(PGⅠ)与胃蛋白酶原Ⅱ(PGⅡ)的分布情况

Pepsinogen I, the precursors of pepsin, is produced by the gastric mucosa and released into the gastric lumen and peripheral circulation. Pepsinogen consists of a single polypeptide chain of 375 amino acids with an average molecular weight of 42 kD. PG I (isoenzyme 1-5) is secreted mainly by chief cells in the fundic mucosa, whereas PG II (isoenzyme 6-7) is secreted by the pyloric glands and the proximal duodenal mucosa.
Precursor reflects numbers of stomach surface cells as well as glandular cells, and monitors gastric atrophy indirectly. They are also extraordinarily stable because they perform their jobs under the harsh conditions present in the digestive system. The atrophy of the corpus mucosa leads to low synthesis of pepsinogen I and hence its low release into the serum. Serum pepsinogen I indicates function and states of gastric mucosa.
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