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021-64195798作者:激發(fā)光源事業(yè)部時(shí)間:2019-09-05 10:33:20瀏覽22427 次
黃色熒光蛋白(Yellow Fluorescent Protein ,YFP)可以看做綠色熒光蛋白的一種突變體,最初來(lái)源于維多利亞多管水母( Aequorea victoria)。相對(duì)于綠色熒光蛋白,其熒光向紅色光譜偏移,而這主要是由于蛋白203位蘇氨酸變?yōu)槔野彼帷F涓蠹ぐl(fā)波長(zhǎng)為514 nm,更大發(fā)射波長(zhǎng)為527 nm。
美國(guó)路陽(yáng)生產(chǎn)一款便攜式熒光蛋白激發(fā)光源,能夠方便快捷觀察EGFP在動(dòng)植物體內(nèi)的表達(dá)。我們免費(fèi)提供樣機(jī)供科研院所試用,滿意付款。如有興趣,可添加微信號(hào)(luyor01)聯(lián)系。
EGFP在煙草上的表達(dá)
綠色熒光蛋白在果蠅上的表達(dá)
黃色熒光蛋白(Yellow Fluorescent Protein ,YFP)可以看做綠色熒光蛋白的一種突變體,最初來(lái)源于維多利亞多管水母( Aequorea victoria)。相對(duì)于綠色熒光蛋白,其熒光向紅色光譜偏移,而這主要是由于蛋白203位蘇氨酸變?yōu)槔野彼帷F涓蠹ぐl(fā)波長(zhǎng)為514 nm,更大發(fā)射波長(zhǎng)為527 nm。excitation wavelength and the emission wavelength for yfp.
Yellow Fluorescent Proteins Excitation Emission
美國(guó)路陽(yáng)生產(chǎn)有多款便攜式激發(fā)光源,無(wú)需熒光顯微鏡就能輕松觀察篩選黃色熒光蛋白表達(dá)陽(yáng)性。LUYOR-3260CY便攜式Y(jié)FP激發(fā)光源能直接分選YFP表達(dá)陽(yáng)性的植株,能夠分選愈傷組織、植株、種子、菌落等。如欲進(jìn)一步了解便攜式熒光蛋白激發(fā)光源,可直接聯(lián)系上海路陽(yáng)生物技術(shù)有限公司的銷售客服。
YFP種類 | Excitation 激發(fā)光波長(zhǎng)(nm) | Emission發(fā)射光波長(zhǎng)(nm) |
EYFP | 514 | 527 |
Topaz | 514 | 527 |
Venus | 515 | 528 |
mCitrine | 516 | 529 |
YPet | 517 | 530 |
TagYFP | 508 | 524 |
PhiYFP | 525 | 537 |
ZsYellow1 | 529 | 539 |
mBanana | 540 | 553 |
LUV-40A熒光蛋白觀察眼鏡是用于觀察黃色熒光蛋白表達(dá)位置
在綠色熒光蛋白的晶體結(jié)構(gòu)研究中發(fā)現(xiàn)203位蘇氨酸接近生色團(tuán)后,對(duì)黃色熒光蛋白家族的研究才開(kāi)始。將203位蘇氨酸突變?yōu)樯彼峥梢苑€(wěn)定生色團(tuán)在激發(fā)狀態(tài)的偶極矩,這樣可以使激發(fā)光和發(fā)射光的波長(zhǎng)均增加20nm。并進(jìn)一步改造成增強(qiáng)黃色熒光蛋白(EYFP)。EYFP是目前應(yīng)用最廣最亮的熒光蛋白之一。EYFP的亮度和發(fā)射光譜的有機(jī)結(jié)合使得這一熒光探針在熒光多色成像中得到很好的應(yīng)用。EYFP還可以與增強(qiáng)青色熒光蛋白(ECFP)或GFP2一起應(yīng)用到FRET中。然而,黃色熒光蛋白也存在一些問(wèn)題,如對(duì)酸性條件非常敏感,pH6.5時(shí)會(huì)失去近50%的熒光。除此之外,EYFP對(duì)氯離子非常敏感,而且光漂白現(xiàn)象比綠色熒光蛋白還嚴(yán)重。
對(duì)黃色熒光蛋白的結(jié)構(gòu)研究已經(jīng)解決了上述問(wèn)題。Citrine變種的亮度與黃色熒光蛋白相當(dāng),而且可以抗光漂白、酸性條件和其他環(huán)境因素的改變。一種珊瑚蛋白,ZsYellow1,產(chǎn)生的真正的黃光是多色熒光實(shí)驗(yàn)中的理想選擇。像ZsGreen1一樣,這個(gè)衍生物也不能像EYFP產(chǎn)生融合蛋白,還易于產(chǎn)生四聚物。越來(lái)越多黃色熒光蛋白的衍生物已經(jīng)用于FRET研究中,在其他研究中也表現(xiàn)出巨大的潛力。
Yellow fluorescent protein (YFP) is a mutant variant of GFP. In this case, a mutation was introduced after the discovery that threonine residue was present near the chromophore in GFP.
To bring stability to the excited dipole moment of chromophore, this threonine residue was mutated. This led to shift by 20 nm in the excitation and emission wavelength of the fluorescent protein, leading to longer wavelengths.
YFP was further improved that led to development of enhanced yellow fluorescent protein or eYFP. This is one of the brightest fluorescent proteins and is widely used for different imaging purposes. GFP and YFP are used in several cases to perform dual imaging, which is a procedure where two molecules are tagged to two different fluorescent proteins. Consequently, they can be imaged together in order to visualize and appraise their inter-dynamics.
Fluorochrome | Excitation Wavelength (Nanometers) | Emission Wavelength (Nanometers) |
---|---|---|
Acridine Orange (Bound to DNA) | 500 | 526 |
Alexa Fluor 488 | 495 | 519 |
Alexa Fluor 500 | 503 | 525 |
Aminofluorescein | 497 | 519 |
Astrazon Orange R | 470 | 540 |
Aurophosphine | 450-490 | 515 |
BCECF (Biscarboxyethylcarboxyfluorescein) | 505 | 530 |
BODIPY 492/515 (Difluoroboradiazaindacene) | 490 | 515 |
BODIPY 493/503 | 500 | 506 |
BODIPY 500/510 | 509 | 515 |
BODIPY 505/515 | 502 | 510 |
BODIPY FL | 503 | 512 |
Calcein | 494 | 517 |
Calcium Green | 506 | 533 |
CellTracker Green CMFDA (Chloromethylfluorescein Diacetate) | 492 | 517 |
CFDA (Carboxyfluorescein Diacetate) | 495 | 520 |
Chinacrine | 450-495 | 515 |
Cl-NERF | 514 (High pH) | 540 (High pH) |
CyQuant GR | 480 | 520 |
DCFH (Carboxydichlorofluorescein) | 505 | 535 |
DiBAC4(3) (Bisdibutylbarbituric Acid) | 493 | 516 |
DiO (Dipentyloxacarbocyanine Iodide) | 484 | 502 |
DiOC16(3) | 484 | 501 |
DiOC18(3) | 484 | 501 |
DiOC2(3) | 482 | 497 |
DiOC5(3) | 484 | 500 |
DiOC6(3) | 484 | 511 |
DiOC7(3) | 482 | 504 |
DM-NERF | 510 (High pH) 497 (Low pH) | 536 (High pH) 527 (Low pH) |
DTAF (Fluorescein Dichlorotriazine) | 494 | 520 |
FAM (Carboxyfluorescein) | 492 | 518 |
FDA (Fluorescein Diacetate) | 495 | 520 |
FITC (Fluorescein Isothiocyanate) | 494 | 518 |
FlCRhR (Cyclic AMP Fluorosensor) | 500 | 517 |
Fluo-3 | 480-506 | 520 |
Fluo-4 | 494 | 516 |
Fluo-4FF | 494 | 518 |
Fluo-5F | 494 | 516 |
Fluo-5N | 493 | 518 |
Fluorescein | 494 | 518 |
Fluorescein Sulfonic Acid | 476 | 519 |
FluoroEmerald | 495 | 524 |
FluorX | 494 | 520 |
FluoZin-1 | 495 | 517 |
FluoZin-2 | 494 | 521 |
FluoZin-3 | 494 | 516 |
GFP-RS (Red-Shifted) | 498 | 516 |
LysoTracker Green DND-26 | 504 | 511 |
Magnesium Green | 506 | 531 |
MitoFluor Green | 490 | 516 |
MitoTracker Green FM | 490 | 516 |
NeuroTrace 500/525 | 500 | 525 |
NeuroTrace 515/535 | 515 | 535 |
Newport Green DCF | 506 | 535 |
Newport Green PDX | 490 | 518 |
Nonyl Acridine Orange | 495 | 519 |
Oligreen | 498 | 518 |
Oregon Green 488 | 496 | 524 |
Oregon Green 500 | 503 | 522 |
Oregon Green 514 | 511 | 530 |
PFB-F (Pentafluorobenzoyl Fluorescein) | 492 | 516 |
Phen Green FL | 492 | 517 |
Phen Green SK | 507 | 532 |
Pico Green | 502 | 523 |
PKH67 | 496 | 520 |
Rhodamine 110 | 496 | 520 |
Rhodamine 123 | 507 | 529 |
Rhodamine Green | 502 | 527 |
Sodium Green | 506 | 532 |
SpectrumGreen 1 | 497 | 524 |
SpectrumGreen 2 | 509 | 538 |
Stachyose Fluorescein | 491 | 516 |
SYBR Gold | 495 | 537 |
SYBR Green I | 498 | 522 |
SYBR Green II | 492 | 513 |
SYTO 11 | 508 | 527 |
SYTO 12 | 499 | 522 |
SYTO 13 | 488 | 509 |
SYTO 16 | 488 | 518 |
SYTO 21 | 494 | 517 |
SYTO 23 | 499 | 520 |
SYTO 24 | 490 | 515 |
SYTOX Green | 504 | 523 |
TAMRA (Carboxytetramethylrhodamine) | 504 | 529 |
YFP/EYFP (Enhanced Yellow Fluorescent Protein) | 512 | 529 |
YOYO-1, YO-PRO-1 | 491 | 509 |
黃光中心波長(zhǎng):570納米;黃光波長(zhǎng)范圍:577nm-597nm,
更多黃光波長(zhǎng)和可見(jiàn)光波長(zhǎng)介紹可瀏覽:《可見(jiàn)光光譜》