# AssayDirect
> AssayDirect (研测达) is an online ordering platform for research validation. Research teams — especially AI protein and drug design teams — configure standard assays at published prices and pay online, from one candidate. Experiments run in reviewed partner laboratories in China using automated methods; an AssayDirect scientist reviews every dataset; results are delivered through a client portal as structured data, including failed candidates.

Key facts:
- Core service: Sequence-to-Binding Screening — upload antibody, VHH, scFv/Fab, IgG or miniprotein binder sequences; expression in E. coli or HEK293, purification, QC and BLI binding, with kinetics as an option.
- Prices in USD, shown before checkout; total = setup + n × (base price + options) − volume discount, with a minimum charge per project. The minimum is per project, not per candidate, and can cover a small quantity or options.
- Delivery: standard orders include data and reports, not physical material. Sequence services need no samples; sample services need the client to ship samples to us. Shipping material back is agreed with the team before ordering and charged separately.
- Payment by card (hosted checkout) or bank transfer; an invoice PDF is available for every order.
- Turnaround starts when inputs pass intake review (format and biosafety screening for sequences; intake QC for samples).
- Data policy: labs receive coded samples only; client owns inputs and results; data is never resold or used to train models; NDAs available.
- Operated from Hong Kong. Contact: info@assaydirect.com. Research use only.

## Services
### Sequence-to-Binding Screening
URL: https://assaydirect.com/services/seq2bind
Category: Antibodies & Proteins · Input: sequences (uploaded, no samples needed) · Turnaround: 3–5 weeks
Price: from $199 (USD) for 1 candidate; setup $100 + $99 per candidate before options; minimum $199 per project.
Upload sequences for expression, purification, quality control and binding assays in the selected E. coli or HEK293 system.

### Protein & Antibody Expression QC
URL: https://assaydirect.com/services/expressqc
Category: Antibodies & Proteins · Input: sequences (uploaded, no samples needed) · Turnaround: 3–5 weeks
Price: from $199 (USD) for 1 candidate; setup $110 + $59 per candidate before options; minimum $199 per project.
Upload sequences for expression, purification and quality control. No binding assay included.

### Peptide Synthesis & QC
URL: https://assaydirect.com/services/peptide
Category: Peptides · Input: sequences (uploaded, no samples needed) · Turnaround: 2–3 weeks
Price: from $199 (USD) for 1 candidate; setup $100 + $65 per candidate before options; minimum $199 per project.
Order linear peptides from one sequence, with HPLC and mass-spectrometry quality checks.

### Peptide Synthesis & Functional Screen
URL: https://assaydirect.com/services/peptidefn
Category: Peptides · Input: sequences (uploaded, no samples needed) · Turnaround: 3–4 weeks
Price: from $199 (USD) for 1 candidate; setup $99 + $100 per candidate before options; minimum $199 per project.
Linear peptides up to 20 aa: synthesis, HPLC/MS quality checks and a single-concentration screen.

### Binding & Kinetics
URL: https://assaydirect.com/services/binding
Category: Antibodies & Proteins · Input: samples (client ships them to us) · Turnaround: 2–3 weeks
Price: from $199 (USD) for 1 candidate; setup $104 + $95 per candidate before options; minimum $199 per project.
BLI or SPR binding assays for existing antibodies or binding proteins against a supported target.

### Protein & Antibody QC
URL: https://assaydirect.com/services/proteinqc
Category: Antibodies & Proteins · Input: samples (client ships them to us) · Turnaround: 1–2 weeks
Price: from $199 (USD) for 1 candidate; setup $60 + $55 per candidate before options; minimum $199 per project.
Concentration and purity checks, with optional aggregation, intact-mass and endotoxin analyses.

### Compound Activity Confirmation
URL: https://assaydirect.com/services/activity
Category: Small Molecules · Input: samples (client ships them to us) · Turnaround: 2–3 weeks
Price: from $199 (USD) for 1 candidate; setup $119 + $80 per candidate before options; minimum $199 per project.
Test compounds prioritised by AI or other computational methods in an established biochemical assay.

### Early ADME Testing
URL: https://assaydirect.com/services/adme
Category: Small Molecules · Input: samples (client ships them to us) · Turnaround: 2–3 weeks
Price: from $199 (USD) for 1 candidate; setup $80 + $90 per candidate before options; minimum $199 per project.
Measure human microsomal stability; add aqueous solubility or plasma protein binding as needed.

### Compound LC-MS Analysis
URL: https://assaydirect.com/services/lcms
Category: Small Molecules · Input: samples (client ships them to us) · Turnaround: ~1 week
Price: from $199 (USD) for 1 candidate; setup $50 + $45 per candidate before options; minimum $199 per project.
LC-MS analysis, with optional HPLC purity testing and ¹H NMR.

### Cell Viability Testing
URL: https://assaydirect.com/services/cell
Category: Cell Assays · Input: samples (client ships them to us) · Turnaround: ~3 weeks
Price: from $199 (USD) for 1 candidate; setup $109 + $90 per candidate before options; minimum $199 per project.
Measure cell viability for compounds with confirmed activity in a supported cell line.

## Pages
- [Services & Pricing](https://assaydirect.com/services): all services with live prices
- [Validation Workflows](https://assaydirect.com/workflows): typical paths for antibodies/binders, small molecules and peptides
- [About & Lab Network](https://assaydirect.com/about): how partner labs are qualified, data review and security
- [Machine-readable catalog](https://assaydirect.com/api/services): JSON with every service, option and price

## Languages
- English: https://assaydirect.com/
- 中文: https://assaydirect.com/zh
- Deutsch: https://assaydirect.com/de
- Français: https://assaydirect.com/fr
- Español: https://assaydirect.com/es
- Português: https://assaydirect.com/pt
- Русский: https://assaydirect.com/ru
- العربية: https://assaydirect.com/ar