Massive Photonics/Cospheric/viagenbiotech廠家答疑與實驗指導

●問題1

貨號：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：客戶詢問該型號對應的CY3B抗體(ti) 和atto655抗體(ti) 的使用順序是否相同？因客戶已采購atto655，現希望改用CY3B進行成像實驗

答：具有相同序列名稱的成像儀(yi) 或產(chan) 品（例如：序列1的sdAB抗鼠試劑；成像儀(yi) 1的atto 655試劑與(yu) 成像儀(yi) 1的Cy3b試劑）可用於(yu) 對該產(chan) 品進行成像。

●問題2

貨號：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：我方想谘詢貴司是否還供應其他類型的高折射率玻璃微球？粒徑約5微米、折射率大於(yu) 1.7的規格均可。若有貨，煩請提供產(chan) 品鏈接，謝謝。

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

●問題3

貨號：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 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 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 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 韦德唯一官方 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：尊敬的技術支持團隊：

我方就小鼠基因分型實驗中使用貴司DirectPCR裂解試劑（鼠尾專(zhuan) 用，貨號102-T）的相關(guan) 問題向貴司尋求幫助。實驗中，我方使用小鼠腳趾樣本替代鼠尾樣本，作為(wei) 該試劑的裂解起始材料。此前使用該產(chan) 品時，腳趾樣本經裂解處理（60℃孵育16小時、85℃孵育45分鍾）後仍保持完整，且一直能獲得高質量、穩定可靠的基因分型結果。兩(liang) 年前，我方突然無法擴增出目標基因分型條帶，這極有可能是由於(yu) 當時所用的該瓶試劑過期所致。我方於(yu) 去年11月采購了一瓶新的DirectPCR裂解試劑（鼠尾專(zhuan) 用，貨號102-T），目前使用該新批次試劑可擴增出條帶，但條帶大小較預期異常偏大。同時我方發現，裂解後的腳趾樣本不再保持完整：軟組織基本全部被消化，僅(jin) 腳趾骨骼在裂解後仍清晰可見，且粗裂解液偶爾會(hui) 出現粘稠的情況。

我方想向貴司谘詢以下問題：

1. 針對腳趾樣本使用該試劑時，出現的上述現象（骨骼可見、粗裂解液粘稠）是否屬於(yu) 正常情況？還是說明樣本發生了過度消化？

2. 若確為(wei) 過度消化，是否會(hui) 導致我方觀察到的條帶分子量異常偏大？

非常感謝貴司能為(wei) 我方解答上述問題，感謝貴司的支持！

答：致團隊各位成員：

感謝你對該問題的詳細描述。根據你反饋的情況，腳趾樣本呈現的消化模式總體(ti) 符合DirectPCR技術的正常表現。用蛋白酶K裂解腳趾組織時，大部分軟組織會(hui) 被高效消化，而骨骼等較硬的結構會(hui) 保留下來，這是正常現象。同樣，裂解成功時通常會(hui) 得到黏性的粗裂解液，因為(wei) 釋放的基因組會(hui) 增加液體(ti) 的黏度。這些現象本身並不能說明存在“過度消化"，延長孵育時間（如16小時）一般也不會(hui) 影響常規基因分型，因為(wei) 適度的片段化不會(hui) 對標準PCR擴增產(chan) 物的擴增產(chan) 生實質性影響。

關(guan) 於(yu) 出現比預期偏大的異常條帶，幾乎不可能是過度消化導致的，因為(wei) 裂解步驟並不會(hui) 產(chan) 生表觀分子量更高的PCR產(chan) 物。條帶大小發生偏移，更常見的原因與(yu) PCR相關(guan) ，比如非特異性擴增、引物設計問題或引物混淆、循環條件改變、聚合酶的選擇不當、凝膠濃度/分子量標準品選擇有誤，或是體(ti) 係中存在影響擴增的抑製劑。建議首先通過引物設計確認預期的擴增產(chan) 物大小，用同一套引物對純化的基因組對照樣本進行PCR擴增，並核對分子量標準品和凝膠的實驗條件。

為(wei) 了讓DirectPCR裂解液的實驗結果具有最佳可重複性，還請確保使用熱啟動韦德唯一官方 聚合酶，且控製裂解液的上樣量（通常每50微升PCR反應體(ti) 係加入0.5-1.0微升裂解液；過量加入裂解液會(hui) 引入抑製劑，且無法提高擴增產(chan) 量）。此外，如果孵育試管時未進行混勻，可適當增加試劑體(ti) 積，或在裂解過程中進行旋轉/振蕩處理，這能提升樣本間的實驗一致性，因為(wei) 裂解不全或裂解效果不均一，有時會(hui) 導致PCR實驗結果出現差異。

●問題4

貨號：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：客戶想谘詢如何確認該產(chan) 品能否檢測細胞中的血紅蛋白？是否有相關(guan) 的文獻引用？

答：親(qin) 愛的簡：

感謝你對此事的耐心等待！

本試劑盒可檢測細胞中的血紅蛋白，但我們(men) 從(cong) 未用其檢測過細胞裂解液中的血紅蛋白。遺憾的是，目前沒有相關(guan) 文獻記載該試劑盒可用於(yu) 檢測細胞中的血紅蛋白。

●問題5

貨號：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：尊敬的【技術支持團隊/銷售代表】：

展信佳！

我方目前正在開展體(ti) 外氯化血紅素處理原代星形膠質細胞的相關(guan) 實驗，計劃檢測細胞攝取的血紅素含量，現就貴司的血紅素酶聯免疫吸附測定試劑盒提出以下問題：

1. 對氯化血紅素的特異性：在我方的體(ti) 外實驗體(ti) 係中，存在的血紅素形式為(wei) 氯化血紅素，貴司的該款血紅素試劑盒是否適用於(yu) 檢測氯化血紅素？

2. 血紅蛋白與(yu) 氯化血紅素的檢測說明：貴司在之前的郵件回複中提到：“該試劑盒可檢測細胞中的血紅蛋白，但我方從(cong) 未使用該試劑盒對細胞裂解液中的血紅蛋白進行過檢測，且目前暫無相關(guan) 文獻證明該試劑盒可實現細胞中血紅蛋白的檢測。"

我方清楚血紅蛋白與(yu) 氯化血紅素為(wei) 不同分子，煩請貴司確認該試劑盒是否為(wei) 專(zhuan) 門檢測氯化血紅素設計，或是否經過驗證可檢測氯化血紅素？

3. 檢測的樣本類型：針對細胞中的血紅素（或氯化血紅素）檢測，使用該試劑盒是否必須采用氯化血紅素處理後的細胞裂解液？還是其他樣本類型（如培養(yang) 基）也可適用？

非常感謝貴司的時間與(yu) 解答，靜候回複。

答：致生物中心團隊：

感謝你補充更多信息跟進此事！

為(wei) 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血紅蛋白，因此我們(men) 此前圍繞這一需求展開了調研。但如果客戶實際想要檢測的是血紅素，我們(men) 還需要針對該需求重新調研。

我會(hui) 盡快為(wei) 你反饋更多相關(guan) 信息。

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（注：本文內(nei) 容基於(yu) 品牌公開資料及行業(ye) 常規信息整理，具體(ti) 以品牌信息文檔為(wei) 準。）