Technical support & resources
Practical answers for the bench, not marketing copy. If your question is not covered here, ask it directly — technical enquiries are answered by a person, typically within one business day.
Reconstitution & handling
Bringing lyophilised protein back into solution without losing activity, and why aliquoting beats re-freezing.
Read the protocol →Choosing a grade
Purity, endotoxin, tag format and expression system: what each one changes about what the material can do.
Open the guide →Buffer selection
Tris, HEPES and MES compared — pH range, temperature behaviour and metal-ion interference.
Compare buffers →Supplier qualification
The checklist to run before you reorder: purity methods, endotoxin, lot consistency, documentation, cold chain.
See the checklist →Lot-to-lot consistency
Why a silent batch shift costs more than a contaminant, and how to protect against it.
Read more →Cold chain & shipping
What is genuinely temperature-sensitive, which documents customs will ask for, and the two failures worth avoiding.
Read more →Frequently asked technical questions
Can you supply a specific purity or endotoxin level?
State the requirement in your enquiry and we will confirm what the lot can meet before you order. Endotoxin grades below 0.1 EU/µg require additional process control and are quoted accordingly.
Do you provide activity data for every product?
No — and we will not claim otherwise. Availability varies by product and by lot. Where activity data exists for a requested item, we will send it with the quotation; where it does not, we will say so.
Can you reserve a validated lot for future reorders?
Where stock allows, yes. Tell us at the time of your first order and we will confirm availability rather than promising it after the fact.
Can you recommend a format for my application?
That is the question we would rather you ask than guess at. Describe the downstream use — antibody pairing, calibrator, cell stimulation, structural work — and we will recommend a specification, including when a cheaper grade is genuinely sufficient.
Do you offer custom expression or conjugation?
Custom and bulk requirements are handled by enquiry rather than as catalog items. Send the target, quantity and timeline and we will tell you whether we can serve it or not.
How to write an enquiry that gets a fast answer
Technical questions are answered by a person who knows the products, usually within one business day. You can make that answer better than "it depends" by including four things:
The material and lot, if you have them
Product name plus the lot number from your previous CoA. If you are reordering after a gap, the lot number tells us immediately what you validated against.
What the material is for
Antibody pairing, calibrator preparation, cell stimulation or structural work. This is the single detail that most changes the recommendation.
What you have already tried
A failed pairing, a reconstitution that went cloudy, a curve that drifted after a new lot — the failure mode is diagnostic, and describing it saves a round of questions.
Your timeline
If the experiment starts on a date, say so. We will confirm honestly whether the lead time fits, and suggest the nearest in-stock alternative when it does not.
Go deeper
The guides above link to full-length articles. The ones most often opened by assay developers:
Request a Quote or Sample
Tell us your application, target purity and quantity — we reply within one business day.