BCA蛋白濃度測定試劑盒
BCA Protein Assay Kit Ver.751259-2.0
|
貨號
|
名稱
|
規(guī)格
|
|
RTP7102
|
BCA蛋白濃度測定試劑盒
|
50次(試管法)
500次(微板法)
|
● 試劑盒組成:
|
貨號
|
產品名稱
|
包裝
|
|
RTP7102-01
|
BCA試劑A
|
100 ml
|
|
RTP7102-02
|
BCA試劑B
|
3 ml
|
|
BSA-01
|
牛血清白蛋白(BSA)標準溶液(5
mg/ml)
|
2×1 ml
|
|
RT0280-02
|
PBS溶液
|
10 ml
|
|
|
說明書
|
1份
|
● 貯存、運輸及效期:
試劑A和試劑B常溫溫貯存;牛血清白蛋白標準溶液-20℃貯存;PBS溶液4℃貯存。試劑盒常溫運輸;有效期1年。
● 產品簡介:
BCA蛋白濃度測定試劑盒的原理是蛋白質分子中肽鍵結構在堿性環(huán)境下能與Cu2+生產絡合物,并將Cu2+還原成Cu+,而BCA試劑可以特異性地與Cu+結合,形成穩(wěn)定的有顏色的復合物,并在562
nm處有最大的光吸收值,該復合物顏色的深淺與蛋白質濃度成正比,可以根據(jù)吸收值的大小來測定蛋白的含量。本試劑盒可以檢測500個樣品(使用微孔板)或50個樣品(使用試管)。
● 產品特點:
1.
靈敏度高,檢測濃度下限達到25 μg/ml(在20-1000
μg/ml濃度范圍內有較好的線性關系),最小檢測蛋白量達到0.2
μg,待測樣品體積為1-20
μl。
2.
BCA法測定蛋白濃度的最大優(yōu)點是蛋白濃度測定可以耐受高濃度的去垢劑,可以兼容樣品中高達5%的SDS,5%的Triton
X-100,5%的Tween
20, 60, 80。但受螯合劑和略高濃度的還原劑的影響,需確保EDTA低于10 mM,無EGTA,二硫蘇糖醇(DTT)低于1 mM,β-巰基乙醇低于0.01%。具體參見五.干擾物質附表。
● 操作方法
一.BCA工作液配制:
1.1 計算工作液總量:
工作液總量 =(BSA標準品樣本個數(shù)×復孔數(shù)+樣本個數(shù)×復孔數(shù))×每個樣本工作液體積
以微板法舉例:
BSA 標準品樣本個數(shù)為8個,復孔數(shù)3個;待測樣本個數(shù)2個,復孔數(shù)2個。
顯色工作液總量 =
(8個BSA
標準品樣本×3+2個待測樣本×2)×200
μl(每個工作液體積)=5.6
ml
注:由于加樣可能存在誤差,建議配制
BCA 工作液時,多配制
1~2 個孔的量。
1.2
按照計算出的所需工作液用量,將試劑A和試劑B按照體積比50:1比例混合,配成BCA工作液。如取6
ml 試劑A與0.12
ml試劑B混合,配成6.12
ml BCA工作液。兩者混合時會有沉淀形成,徹底混勻后沉淀消失,溶液應為澄清藍綠色溶液。
注:新配制的BCA工作液常溫密封條件下可穩(wěn)定保存
24 h。
二.微孔板測定程序:(工作范圍20-1000
μg/ml)
2.1
蛋白標準品配制:常溫完全溶解蛋白標準品,取60 μl 5 mg/ml BSA蛋白標準溶液加240
μl PBS溶液,配制為300 μl終濃度為1
mg/ml BSA標準溶液。
2.2
按照下表配制BSA標準測定溶液:
|
編號
|
0
|
1
|
2
|
3
|
4
|
5
|
6
|
7
|
|
BSA終濃度 μg/ml
|
0
|
25
|
50
|
100
|
200
|
400
|
800
|
1000
|
|
1mg/ml BSA標準溶液 μl
|
0
|
2.5
|
5
|
10
|
20
|
40
|
80
|
100
|
|
PBS 溶液 μl
|
100
|
97.5
|
95
|
90
|
80
|
60
|
20
|
0
|
|
總體積 μl
|
100 μl
|
2.3
標準孔:取20 μl不同濃度標準品,加到微孔板中;
樣品孔:取適當體積的待測樣品加入到微孔板中,并用PBS補足到20
μl。
2.4
向微孔板中加入200
μl BCA工作液,混勻,37℃放置30分鐘;
注:也可以常溫放置2小時。BCA法測定蛋白濃度時,顏色會隨著時間的延長不斷加深,并且顯色反應會因溫度升高而加快,如果濃度較低,適合在較高溫度孵育,或適當延長孵育時間。
2.5
測定562
nm 處的吸光值,并記錄讀數(shù);以不含BSA
的樣品的光吸收值作為空白對照。
2.6 以BSA含量為縱坐標, A562為橫坐標,繪制標準曲線,計算樣品中的蛋白濃度。如果所得到的蛋白濃度不在標準曲線范圍內,請稀釋樣品后重新測定。
三.試管測定程序:(工作范圍20-1000
μg/ml)
3.1蛋白標準品配制:常溫完全溶解蛋白標準品,取60
μl 5 mg/ml BSA蛋白標準溶液加240 μl PBS溶液,配制為300
μl終濃度為1 mg/ml BSA標準溶液。
3.2在5
ml離心管中,按照下表配制BSA標準測定溶液:
|
編號
|
0
|
1
|
2
|
3
|
4
|
5
|
6
|
7
|
|
BSA終濃度 μg/ml
|
0
|
25
|
50
|
100
|
200
|
400
|
800
|
1000
|
|
1mg/ml BSA標準溶液 μl
|
0
|
2.5
|
5
|
10
|
20
|
40
|
80
|
100
|
|
PBS 溶液 μl
|
100
|
97.5
|
95
|
90
|
80
|
60
|
20
|
0
|
|
總體積 μl
|
100 μl
|
3.3
將適當體積的待測樣品加入到試管中,并用PBS補足到100
μl;
3.4
向標準管和樣品管中加入2 ml
BCA工作液,混勻,37℃放置30分鐘;
注:也可以常溫放置2小時。BCA法測定蛋白濃度時,顏色會隨著時間的延長不斷加深,并且顯色反應會因溫度升高而加快,如果濃度較低,適合在較高溫度孵育,或適當延長孵育時間。
3.5 取1
ml溶液加入到1
ml玻璃比色皿中,測定562
nm 處的吸光值,并記錄讀數(shù);以不含BSA
的樣品的光吸收值作為空白對照。
3.6 以BSA含量為縱坐標,A562為橫坐標,繪制標準曲線,計算樣品中的蛋白濃度。如果所得到的蛋白濃度不在標準曲線范圍內,請稀釋樣品后重新測定。
四.實驗示例:
|
|
BSA標準品A562
|
BSA濃度
|
樣品A562
|
測定濃度
|
稀釋倍數(shù)
|
原始濃度
|
|
|
1
|
2
|
3
|
平均值
|
減去空白
|
ng/μl
|
減去空白
|
ng/μl
|
|
ng/μl
|
|
0
|
0.086
|
0.079
|
0.083
|
0.083
|
|
|
0.59
|
1068.7
|
×5
|
5344
|
|
1
|
0.094
|
0.089
|
0.093
|
0.092
|
0.009
|
25
|
0.309
|
555.7
|
×10
|
5557
|
|
2
|
0.109
|
0.106
|
0.115
|
0.11
|
0.027
|
50
|
|
|
|
|
|
3
|
0.145
|
0.147
|
0.151
|
0.148
|
0.065
|
100
|
|
|
|
|
|
4
|
0.205
|
0.202
|
0.205
|
0.204
|
0.121
|
200
|
|
|
|
|
|
5
|
0.307
|
0.318
|
0.32
|
0.315
|
0.232
|
400
|
|
|
|
|
|
6
|
0.52
|
0.513
|
0.53
|
0.521
|
0.438
|
800
|
|
|
|
|
|
7
|
0.623
|
0.619
|
0.659
|
0.634
|
0.551
|
1000
|
|
|
|
|
微孔板法:工作液總量 = (BSA標準品樣本個數(shù)×復孔數(shù)+樣本數(shù)×復孔數(shù))×樣本工作液體積=(8×3+2×1)×0.2 ml=5.2 ml;配制5.5
ml顯色工作液:5.5
ml試劑A加入0.11
ml 試劑B,混勻;按照操作步驟配制各種濃度BSA標曲溶液100
μl,各取20 μl加到微孔板中;取待測樣品4
μl和2
μl,分別加16
μl 和18
μl 1×PBS(稀釋5倍和10倍),加到微孔板中;隨后加入顯色工作液200 μl,37℃ 20 min后讀數(shù),吸光值為橫坐標,BSA濃度為縱坐標,做出標準曲線,y=1825.8x-8.5089,R2=0.999,樣品蛋白濃度=5×(1825.8×0.59-8.5089)=5344
ng/μl=5.344 μg/μl或者樣品蛋白濃度=10×(1825.8×0.309-8.5089)=5557
ng/μl=5.557 μg/μl。
五.干擾物質附表:
|
化合物
|
耐受濃度
|
化合物
|
耐受濃度
|
化合物
|
耐受濃度
|
|
緩沖液
|
去垢劑和變性劑
|
還原劑
|
|
甘氨酸
|
1 M
|
CHAPS
|
5%
|
DTT
|
1 mM
|
|
Bicine
|
20 mM
|
鹽酸胍
|
4 M
|
β-巰基乙醇
|
0.01%
|
|
Bis-Tris
|
33 mM pH6.5
|
Triton X-100
|
5%
|
TCEP
|
不兼容
|
|
HEPES
|
0.1 M pH7.5
|
Triton X-114
|
1%
|
螯合劑
|
|
MES
|
50 mM
|
NP-10
|
5%
|
EDTA
|
10 mM
|
|
MOPS
|
50 mM
|
Tween 20
|
5%
|
EGTA
|
不兼容
|
|
檸檬酸鈉
|
200 mM pH4.8
|
SDS
|
5%
|
糖類
|
|
PIPES
|
50 mM
|
脫氧膽酸鈉
|
5%
|
葡萄糖
|
10 mM
|
|
TES
|
50 mM
|
尿素
|
3 M
|
蔗糖
|
40%
|
|
Tricine
|
25 mM pH8.0
|
鹽類
|
有機化合物
|
|
Tris-HCl
|
250 mM pH8.0
|
氯化鈉
|
1 M
|
甘油
|
10%
|
|
醋酸鈉
|
0.2 M pH5.5
|
硫酸銨
|
1.5 M
|
乙醇
|
10%
|
|
咪唑
|
50 mM pH7.0
|
酸堿
|
甲醇
|
10%
|
|
三乙醇胺
|
25 mM pH7.8
|
鹽酸
|
100 mM
|
DMSO
|
10%
|
|
磷酸鈉
|
100 mM
|
氫氧化鈉
|
100 mM
|
丙酮
|
10%
|
使用RTP7102 BCA蛋白定量試劑盒發(fā)表部分文章列表(12篇)
1. [2022 IF=1.09] MACC1
facilitates the escape of nasopharyngeal carcinoma cells from killing by
natural killer cells.
Author: Chong Zhao,
Yuehua Liu, Zhuoping Liang, Huajun Feng & Sheng’en Xu
Journal: Biotechnology
& Biotechnological Equipment. Volume 33, 2019 - Issue 1
Institution: Affiliated Hospital of Southwest
Medical University
Paper link: https://www.tandfonline.com/doi/full/10.1080/13102818.2019.1596041
2. [2022 IF=8.469]
Decreased ZNF750 promotes angiogenesis in a paracrine manner via activating DANCR/miR-4707-3p/FOXC2
axis in esophageal cell carcinomasquamous.
Author: Yanghui Bi,
Shixing Guo,Yongping Cui
Journal: Cell
Death & Disease (2020) 11:296
Institution:Shanxi Medical University
Paper link:https://doi.org/10.1038/s41419-020-2492-2
3. [2022 IF=1.6] Molecular
mechanism of microRNA-26a regulation of phosphatase and tensin homolog gene in
condyloma acuminatum and penile squamous cell carcinoma.
Author: Yayu Hu,Xiaoli
Ren
Journal: Journal of International Medical Research (2021) 49(7) 1–13
Institution:Taizhou Municipal Hospital
Paper link:https://journals.sagepub.com/doi/10.1177/03000605211014379
4. [2022 IF=13.164]
Verticillium dahliae Secretory Effector PevD1 Induces Leaf Senescence by
Promoting ORE1-Mediated Ethylene Biosynthesis.
Author: Yi Zhang, Yuhan
Gao, Hou-Ling Wang, Chengcheng Kan, Ze Li, Xiufen Yang,Weilun Yin, Xinli Xia,
Hong Gil Nam, Zhonghai Li, Hongwei Guo.
Journal: Molecular
Plant. 2021,20 July.
Institution:Beijing Forestry University, Beijing
Paper link:https://doi.org/10.1016/j.molp.2021.07.014
5. [2022 IF= ] Enhancing
the Methanol Tolerance of Candida antarctica Lipase B by Saturation Mutagenesis
for Biodiesel Preparation.
Author: Zhongbiao Tan,Xiangqian Li
Journal: Research
Square
Institution:Huaiyin Institute of Technology
Paper link:https://www.researchsquare.com/article/rs-813893/v1
6. [2022 IF=4 ] The
effects of microRNA-126 reduced inflammation and apoptosis of diabetic
nephropathy through PI3K/AKT signalling pathway by VEGF.
Author: Zhe Lou, Qiaobei Li, Chunyan Wang and
Yinyan Li
Journal: Archives
of Physiology and Biochemistry Published
online: 25 May 2020
Institution:the First Affiliated Hospital of China
Medical University
Paper link:https://www.tandfonline.com/doi/full/10.1080/13813455.2020.1767146
7. [2022 IF=3.7] Circ_0138960
knockdown alleviates lipopolysaccharide-induced inflammatory response and
injury in human dental pulp cells by targeting miR-545-5p/MYD88 axis in pulpitis.
Author: Changfu Liang, Wenzhi Wu, Xiaoning He,
Fengming Xue,Daxing Feng
Journal: Journal
of Dental Sciences Published
online: 2022
Institution:Department of Stomatology, The Second
Affiliated Hospital of Hainan Medical University
Paper link: https://linkinghub.elsevier.com/retrieve/pii/S1991790222001441
8. [2022 IF=2.1]Transferrin receptor modulated by
microRNA-497-5p suppresses cervical cancer cell malignant phenotypes.
Author: Xiangming Fang, Pei Hu, Ying Gao, Chuqiao
Chen, Jianqing Xu
Journal: Advances
in Clinical and Experimental Medicine Published online on July 24, 2023
Institution:Zhejiang Shuren University
Paper link: https://advances.umw.edu.pl/en/ahead-of-print/168342/
9. [2022 IF=2.7] Detection of N?glycoprotein associated with IgA
nephropathy in urine as a
potential diagnostic biomarker using glycosylated proteomic analysis.
Author: Junjie Liu, Liuguo Wu,
Hongjing Gu, Miaomiao Lu, Jiong Zhang
And Hongli Zhou
Journal: Experimental
And Therapeutic Medicine 26: 478,
2023
Institution:Department of Nephrology, The First
Affiliated Hospital of Jinzhou Medical University
Paper link: https://pubmed.ncbi.nlm.nih.gov/37753295/
10. [2022 IF=2] Up-regulation of Trim28 in
pregnancy-induced hypertension is involved in the injury of human umbilical vein
endothelial cells through the p38 signaling pathway.
Author: Min Chen, Peng Shi, Ping Wang, Tingting
Zhang, Jing Zhao and Li Zhao
Journal: Histology
and Histopathology (2024) 39: 603-610
Institution:The Affiliated Taian City Central Hospital
of Qingdao University
Paper link: https://pubmed.ncbi.nlm.nih.gov/37522419
11. [2022 IF=6.9] Galactinol
synthase 2 infuences the metabolism of chlorophyll, carotenoids, and ethylene
in tomato fruits.
Author: Huidong Zhang,
Kunpeng Zhang, Xueya Zhao, Mengxi Bi, Yudong Liu, Shuo Wang, Yi He,Kui Ma, Mingfang Qi
Journal: Journal
of Experimental Botany Published: 15 March 2024
Institution:College of Horticulture, Shenyang
Agricultural University
Paper link: https://doi.org/10.1093/jxb/erae121
12. [2023 IF=2.8] Anti?tumor activity
of butorphanol in colorectal cancer via targeting SIGMAR1.
Author: Xueqi Hou,
Longfei Qu,Yong Xu,Jie Liu, Jianlian Guo
Journal: Discover
Oncology (2024) 15:711
Institution:School of Medicine, Xiamen University
Paper link: https://doi.org/10.1007/s12672-024-01581-1