Massive Photonics/Cospheric/viagenbiotech厂家答疑与实验指导

●问题1

货号：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.

译文：

问：客户询问该型号对应的CY3B抗体和atto655抗体的使用顺序是否相同？因客户已采购atto655，现希望改用CY3B进行成像实验

答：具有相同序列名称的成像仪或产品（例如：序列1的sdAB抗鼠试剂；成像仪1的atto 655试剂与成像仪1的Cy3b试剂）可用于对该产品进行成像。

●问题2

货号：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.

译文：

问：我方想咨询贵司是否还供应其他类型的高折射率玻璃微球？粒径约5微米、折射率大于1.7的规格均可。若有货，烦请提供产品链接，谢谢。

答：遗憾的是，BTGMS 5-22微米规格的产品是一款折射率高且规格可低至5微米区间的玻璃产品。

●问题3

货号：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.

译文：

问：尊敬的技术支持团队：

我方就小鼠基因分型实验中使用贵司DirectPCR裂解试剂（鼠尾专用，货号102-T）的相关问题向贵司寻求帮助。实验中，我方使用小鼠脚趾样本替代鼠尾样本，作为该试剂的裂解起始材料。此前使用该产品时，脚趾样本经裂解处理（60℃孵育16小时、85℃孵育45分钟）后仍保持完整，且一直能获得高质量、稳定可靠的基因分型结果。两年前，我方突然无法扩增出目标基因分型条带，这极有可能是由于当时所用的该瓶试剂过期所致。我方于去年11月采购了一瓶新的DirectPCR裂解试剂（鼠尾专用，货号102-T），目前使用该新批次试剂可扩增出条带，但条带大小较预期异常偏大。同时我方发现，裂解后的脚趾样本不再保持完整：软组织基本全部被消化，仅脚趾骨骼在裂解后仍清晰可见，且粗裂解液偶尔会出现粘稠的情况。

我方想向贵司咨询以下问题：

1. 针对脚趾样本使用该试剂时，出现的上述现象（骨骼可见、粗裂解液粘稠）是否属于正常情况？还是说明样本发生了过度消化？

2. 若确为过度消化，是否会导致我方观察到的条带分子量异常偏大？

非常感谢贵司能为我方解答上述问题，感谢贵司的支持！

答：致团队各位成员：

感谢你对该问题的详细描述。根据你反馈的情况，脚趾样本呈现的消化模式总体符合DirectPCR技术的正常表现。用蛋白酶K裂解脚趾组织时，大部分软组织会被高效消化，而骨骼等较硬的结构会保留下来，这是正常现象。同样，裂解成功时通常会得到黏性的粗裂解液，因为释放的基因组DNA会增加液体的黏度。这些现象本身并不能说明存在“过度消化"，延长孵育时间（如16小时）一般也不会影响常规基因分型，因为适度的DNA片段化不会对标准PCR扩增产物的扩增产生实质性影响。

关于出现比预期偏大的异常条带，几乎不可能是过度消化导致的，因为裂解步骤并不会产生表观分子量更高的PCR产物。条带大小发生偏移，更常见的原因与PCR相关，比如非特异性扩增、引物设计问题或引物混淆、循环条件改变、聚合酶的选择不当、凝胶浓度/分子量标准品选择有误，或是体系中存在影响扩增的抑制剂。建议首先通过引物设计确认预期的扩增产物大小，用同一套引物对纯化的基因组DNA对照样本进行PCR扩增，并核对分子量标准品和凝胶的实验条件。

为了让DirectPCR裂解液的实验结果具有最佳可重复性，还请确保使用热启动Taq DNA聚合酶，且控制裂解液的上样量（通常每50微升PCR反应体系加入0.5-1.0微升裂解液；过量加入裂解液会引入抑制剂，且无法提高扩增产量）。此外，如果孵育试管时未进行混匀，可适当增加试剂体积，或在裂解过程中进行旋转/振荡处理，这能提升样本间的实验一致性，因为裂解不全或裂解效果不均一，有时会导致PCR实验结果出现差异。

●问题4

货号：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.

译文：

问：客户想咨询如何确认该产品能否检测细胞中的血红蛋白？是否有相关的文献引用？

答：亲爱的简：

感谢你对此事的耐心等待！

本试剂盒可检测细胞中的血红蛋白，但我们从未用其检测过细胞裂解液中的血红蛋白。遗憾的是，目前没有相关文献记载该试剂盒可用于检测细胞中的血红蛋白。

●问题5

货号：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.

译文：

问：尊敬的【技术支持团队/销售代表】：

展信佳！

我方目前正在开展体外氯化血红素处理原代星形胶质细胞的相关实验，计划检测细胞摄取的血红素含量，现就贵司的血红素酶联免疫吸附测定试剂盒提出以下问题：

1. 对氯化血红素的特异性：在我方的体外实验体系中，存在的血红素形式为氯化血红素，贵司的该款血红素试剂盒是否适用于检测氯化血红素？

2. 血红蛋白与氯化血红素的检测说明：贵司在之前的邮件回复中提到：“该试剂盒可检测细胞中的血红蛋白，但我方从未使用该试剂盒对细胞裂解液中的血红蛋白进行过检测，且目前暂无相关文献证明该试剂盒可实现细胞中血红蛋白的检测。"

我方清楚血红蛋白与氯化血红素为不同分子，烦请贵司确认该试剂盒是否为专门检测氯化血红素设计，或是否经过验证可检测氯化血红素？

3. 检测的样本类型：针对细胞中的血红素（或氯化血红素）检测，使用该试剂盒是否必须采用氯化血红素处理后的细胞裂解液？还是其他样本类型（如培养基）也可适用？

非常感谢贵司的时间与解答，静候回复。

答：致生物中心团队：

感谢你补充更多信息跟进此事！

为造成的误解致歉——你在最初的邮件中提到客户想要用该试剂盒检测血红蛋白，因此我们此前围绕这一需求展开了调研。但如果客户实际想要检测的是血红素，我们还需要针对该需求重新调研。

我会尽快为你反馈更多相关信息。

更多产品信息，请联系中国区域代理商：上海起发实验试剂有限公司

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（注：本文内容基于品牌公开资料及行业常规信息整理，具体以品牌信息文档为准。）