●問(wèn)題1

貨號(hào)：MASSIVE-sdAB-Cy3B

品名：MASSIVE-sdAB 1-PLEX - Anti-Mouse, Cy3B

品牌：Massive Photonics

原文：

Q:The customer asked if the sequence of antibody CY3B and atto655 for this model is the same? Because the customer has already purchased atto655 but now wants to use CY3B imaging

A:Imagers or products that have the same sequence name (ex: sdAB anti-mouse with sequence 1; Imager 1 atto 655 & Imager 1 Cy3b) can be used to image the product.

譯文：

問(wèn)：客戶詢問(wèn)該型號(hào)對(duì)應(yīng)的CY3B抗體和atto655抗體的使用順序是否相同？因客戶已采購(gòu)atto655，現(xiàn)希望改用CY3B進(jìn)行成像實(shí)驗(yàn)

答：具有相同序列名稱的成像儀或產(chǎn)品（例如：序列1的sdAB抗鼠試劑；成像儀1的atto 655試劑與成像儀1的Cy3b試劑）可用于對(duì)該產(chǎn)品進(jìn)行成像。

●問(wèn)題2

貨號(hào)：BTGMS-4.155-22um-0.1g

品名：Barium Titanate Solid Glass Microspheres n~1.9 d=4.15g/cc 5-22um - 0.1g

品牌：Cospheric

原文：

Q:I would like to inquire if you also supply other types of high-refractive-index glass microspheres? Specifications around 5 um in particle size with a refractive index greater than 1.7 are acceptable. If available, please provide a product link. Thank you.

A:Unfortunately the BTGMS 5-22um product is the only high index of refraction glass which goes down to the 5um size range.

譯文：

問(wèn)：我方想咨詢貴司是否還供應(yīng)其他類型的高折射率玻璃微球？粒徑約5微米、折射率大于1.7的規(guī)格均可。若有貨，煩請(qǐng)?zhí)峁┊a(chǎn)品鏈接，謝謝。

答：遺憾的是，BTGMS 5-22微米規(guī)格的產(chǎn)品是一款折射率高且規(guī)格可低至5微米區(qū)間的玻璃產(chǎn)品。

●問(wèn)題3

貨號(hào)：102-T

品名：DirectPCR Lysis Reagent (mouse tail) 100ml

品牌：viagenbiotech

原文：

Q:Dear Technical Support Team, I am reaching out for assistance regarding the use of your DirectPCR Lysis Reagent (Mouse Tail, Cat#102-T) in our mouse genotyping experiments. We use mouse toe samples instead of mouse tails as the starting material for lysis with this reagent. Previously when we used this product, the toe samples remained fully intact after the lysis procedure(60℃ 16h; 85℃ 45min), and we consistently obtained high-quality, reliable genotyping results. Two years ago, we suddenly failed to obtain any target genotyping bands, which was most likely caused by the expiration of that specific bottle of your reagent. We purchased a new bottle of DirectPCR Lysis Reagent (Mouse Tail, Cat#102-T) last November. Now we are able to get bands with this new batch, but the bands are abnormally larger than expected. We also noticed that the toe samples are no longer intact after lysis: all the soft tissues are mostly digested, with the toe bones remaining visible after the lysis step. Occasionally, the crude lysate appears viscous. We would like to consult you on the following questions: 1. Are these observations (bone visible and crude lysate appears viscous) normal phenomenon when using this reagent for toe samples? Or does it indicate that our samples are over-digested? 2. If this is over-digestion, could it be the cause of the abnormally large molecular weight of the bands we observed? We would highly appreciate your guidance on these issues. Thank you for your support!

A:Dear Team,

Thank you for your detailed description of the issue. Based on what you reported, the digestion pattern you are seeing with toe samples is generally consistent with normal DirectPCR performance. When toe tissues are lysed with Proteinase K, it is expected that most soft tissues will be digested efficiently while harder structures (e.g., bone) remain visible. Likewise, a viscous crude lysate is commonly observed when lysis is successful, as released genomic DNA can increase viscosity. These findings do not, by themselves, indicate “over-digestion," and extended incubation (such as 16 hours) typically does not compromise routine genotyping because moderate DNA fragmentation does not materially affect amplification of standard PCR-sized amplicons.

Regarding the abnormally larger-than-expected bands, over-digestion is very unlikely to be the cause, since the lysis step does not create PCR products that migrate at a higher apparent molecular weight. A band size shift is more commonly explained by PCR-related factors such as non-specific amplification, primer design or primer mix-ups, altered cycling conditions, polymerase choice, gel percentage/ladder selection, or the presence of inhibitors that can affect amplification behavior. As a first check, we recommend confirming the expected amplicon size from the primer design, running a purified genomic DNA control with the same primer set, and verifying your ladder and gel conditions.

For best reproducibility with DirectPCR lysates, please also ensure that you are using a hot-start Taq polymerase and that lysate input is kept low (typically 0.5-1.0 µl lysate per 50 µl PCR reaction; excess lysate can introduce inhibitors without improving yield). In addition, if your tubes are incubated without mixing, increasing reagent volume and/or providing rotation/shaking during lysis can improve consistency across samples, as incomplete or heterogeneous lysis can sometimes lead to variable PCR behavior.

譯文：

問(wèn)：尊敬的技術(shù)支持團(tuán)隊(duì)：

我方就小鼠基因分型實(shí)驗(yàn)中使用貴司DirectPCR裂解試劑（鼠尾專用，貨號(hào)102-T）的相關(guān)問(wèn)題向貴司尋求幫助。實(shí)驗(yàn)中，我方使用小鼠腳趾樣本替代鼠尾樣本，作為該試劑的裂解起始材料。此前使用該產(chǎn)品時(shí)，腳趾樣本經(jīng)裂解處理（60℃孵育16小時(shí)、85℃孵育45分鐘）后仍保持完整，且一直能獲得高質(zhì)量、穩(wěn)定可靠的基因分型結(jié)果。兩年前，我方突然無(wú)法擴(kuò)增出目標(biāo)基因分型條帶，這極有可能是由于當(dāng)時(shí)所用的該瓶試劑過(guò)期所致。我方于去年11月采購(gòu)了一瓶新的DirectPCR裂解試劑（鼠尾專用，貨號(hào)102-T），目前使用該新批次試劑可擴(kuò)增出條帶，但條帶大小較預(yù)期異常偏大。同時(shí)我方發(fā)現(xiàn)，裂解后的腳趾樣本不再保持完整：軟組織基本全部被消化，僅腳趾骨骼在裂解后仍清晰可見(jiàn)，且粗裂解液偶爾會(huì)出現(xiàn)粘稠的情況。

我方想向貴司咨詢以下問(wèn)題：

1. 針對(duì)腳趾樣本使用該試劑時(shí)，出現(xiàn)的上述現(xiàn)象（骨骼可見(jiàn)、粗裂解液粘稠）是否屬于正常情況？還是說(shuō)明樣本發(fā)生了過(guò)度消化？

2. 若確為過(guò)度消化，是否會(huì)導(dǎo)致我方觀察到的條帶分子量異常偏大？

非常感謝貴司能為我方解答上述問(wèn)題，感謝貴司的支持！

答：致團(tuán)隊(duì)各位成員：

感謝你對(duì)該問(wèn)題的詳細(xì)描述。根據(jù)你反饋的情況，腳趾樣本呈現(xiàn)的消化模式總體符合DirectPCR技術(shù)的正常表現(xiàn)。用蛋白酶K裂解腳趾組織時(shí)，大部分軟組織會(huì)被高效消化，而骨骼等較硬的結(jié)構(gòu)會(huì)保留下來(lái)，這是正常現(xiàn)象。同樣，裂解成功時(shí)通常會(huì)得到黏性的粗裂解液，因?yàn)獒尫诺幕蚪MDNA會(huì)增加液體的黏度。這些現(xiàn)象本身并不能說(shuō)明存在“過(guò)度消化"，延長(zhǎng)孵育時(shí)間（如16小時(shí)）一般也不會(huì)影響常規(guī)基因分型，因?yàn)檫m度的DNA片段化不會(huì)對(duì)標(biāo)準(zhǔn)PCR擴(kuò)增產(chǎn)物的擴(kuò)增產(chǎn)生實(shí)質(zhì)性影響。

關(guān)于出現(xiàn)比預(yù)期偏大的異常條帶，幾乎不可能是過(guò)度消化導(dǎo)致的，因?yàn)榱呀獠襟E并不會(huì)產(chǎn)生表觀分子量更高的PCR產(chǎn)物。條帶大小發(fā)生偏移，更常見(jiàn)的原因與PCR相關(guān)，比如非特異性擴(kuò)增、引物設(shè)計(jì)問(wèn)題或引物混淆、循環(huán)條件改變、聚合酶的選擇不當(dāng)、凝膠濃度/分子量標(biāo)準(zhǔn)品選擇有誤，或是體系中存在影響擴(kuò)增的抑制劑。建議首先通過(guò)引物設(shè)計(jì)確認(rèn)預(yù)期的擴(kuò)增產(chǎn)物大小，用同一套引物對(duì)純化的基因組DNA對(duì)照樣本進(jìn)行PCR擴(kuò)增，并核對(duì)分子量標(biāo)準(zhǔn)品和凝膠的實(shí)驗(yàn)條件。

為了讓DirectPCR裂解液的實(shí)驗(yàn)結(jié)果具有最佳可重復(fù)性，還請(qǐng)確保使用熱啟動(dòng)Taq DNA聚合酶，且控制裂解液的上樣量（通常每50微升PCR反應(yīng)體系加入0.5-1.0微升裂解液；過(guò)量加入裂解液會(huì)引入抑制劑，且無(wú)法提高擴(kuò)增產(chǎn)量）。此外，如果孵育試管時(shí)未進(jìn)行混勻，可適當(dāng)增加試劑體積，或在裂解過(guò)程中進(jìn)行旋轉(zhuǎn)/振蕩處理，這能提升樣本間的實(shí)驗(yàn)一致性，因?yàn)榱呀獠蝗蛄呀庑Ч痪唬袝r(shí)會(huì)導(dǎo)致PCR實(shí)驗(yàn)結(jié)果出現(xiàn)差異。

●問(wèn)題4

貨號(hào)：RDSM151

品名：Heme Microplate Assay Kit

品牌：Cospheric

原文：

Q:The customer wants to ask how to identify whether this can detect hemoglobin in cells? Is there any relevant literature cited

A:Dear Jane,

Thank you for your patience with this!

This kit can detect hemoglobin in cells, however, we have not ever tested cell lysate for hemoglobin with this kit. Unfortunately we do not know of any citations for this kit that demonstrate detecting hemoglobin in cells.

譯文：

問(wèn)：客戶想咨詢?nèi)绾未_認(rèn)該產(chǎn)品能否檢測(cè)細(xì)胞中的血紅蛋白？是否有相關(guān)的文獻(xiàn)引用？

答：親愛(ài)的簡(jiǎn)：

感謝你對(duì)此事的耐心等待！

本試劑盒可檢測(cè)細(xì)胞中的血紅蛋白，但我們從未用其檢測(cè)過(guò)細(xì)胞裂解液中的血紅蛋白。遺憾的是，目前沒(méi)有相關(guān)文獻(xiàn)記載該試劑盒可用于檢測(cè)細(xì)胞中的血紅蛋白。

●問(wèn)題5

貨號(hào)：RDSM151

品名：Heme Microplate Assay Kit

品牌：Cospheric

原文：

Q:Dear [Technical Support Team / Sales Representative],

I hope this message finds you well.

I am currently conducting experiments involving primary astrocytes treated with hemin in vitro, and I plan to measure the amount of heme taken up by the cells. I have a few questions regarding your heme ELISA kit:

Specificity for hemin: In our in vitro system, the only available form of heme is hemin. Would your heme ELISA kit be suitable for detecting hemin?

Clarification on hemoglobin vs. hemin: In your previous mail reply, you mentioned:

"This kit can detect hemoglobin in cells; however, we have not ever tested cell lysate for hemoglobin with this kit. Unfortunately, we do not know of any citations for this kit that demonstrate detecting hemoglobin in cells."

I understand that hemoglobin and hemin are different molecules. Could you please confirm whether your kit is designed or validated to detect hemin specifically?

Sample type for detection: Regarding the detection of heme (or hemin) in cells, does your kit require the use of cell lysates after hemin treatment? Or are other sample types (such as culture medium) also applicable?

Thank you very much for your time and assistance. I look forward to your reply.

A:Dear BIoHub Team,

Thank you for following up on this with more information!

My apologies for any confusion - in your original mail you mentioned the customer wanted to test the kit with hemoglobin, so that is what we looked into. However, if the customer is actually interested in measuring Hemin, we will need to look into that as well.

I will get back to you soon with more feedback.

譯文：

問(wèn)：尊敬的【技術(shù)支持團(tuán)隊(duì)/銷售代表】：

展信佳！

我方目前正在開(kāi)展體外氯化血紅素處理原代星形膠質(zhì)細(xì)胞的相關(guān)實(shí)驗(yàn)，計(jì)劃?rùn)z測(cè)細(xì)胞攝取的血紅素含量，現(xiàn)就貴司的血紅素酶聯(lián)免疫吸附測(cè)定試劑盒提出以下問(wèn)題：

1. 對(duì)氯化血紅素的特異性：在我方的體外實(shí)驗(yàn)體系中，存在的血紅素形式為氯化血紅素，貴司的該款血紅素試劑盒是否適用于檢測(cè)氯化血紅素？

2. 血紅蛋白與氯化血紅素的檢測(cè)說(shuō)明：貴司在之前的郵件回復(fù)中提到：“該試劑盒可檢測(cè)細(xì)胞中的血紅蛋白，但我方從未使用該試劑盒對(duì)細(xì)胞裂解液中的血紅蛋白進(jìn)行過(guò)檢測(cè)，且目前暫無(wú)相關(guān)文獻(xiàn)證明該試劑盒可實(shí)現(xiàn)細(xì)胞中血紅蛋白的檢測(cè)。"

我方清楚血紅蛋白與氯化血紅素為不同分子，煩請(qǐng)貴司確認(rèn)該試劑盒是否為專門檢測(cè)氯化血紅素設(shè)計(jì)，或是否經(jīng)過(guò)驗(yàn)證可檢測(cè)氯化血紅素？

3. 檢測(cè)的樣本類型：針對(duì)細(xì)胞中的血紅素（或氯化血紅素）檢測(cè)，使用該試劑盒是否必須采用氯化血紅素處理后的細(xì)胞裂解液？還是其他樣本類型（如培養(yǎng)基）也可適用？

非常感謝貴司的時(shí)間與解答，靜候回復(fù)。

答：致生物中心團(tuán)隊(duì)：

感謝你補(bǔ)充更多信息跟進(jìn)此事！

為造成的誤解致歉——你在最初的郵件中提到客戶想要用該試劑盒檢測(cè)血紅蛋白，因此我們此前圍繞這一需求展開(kāi)了調(diào)研。但如果客戶實(shí)際想要檢測(cè)的是血紅素，我們還需要針對(duì)該需求重新調(diào)研。

我會(huì)盡快為你反饋更多相關(guān)信息。

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