Q301--Modification - Q & A for Advanced Genetic Sequencing

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Contract Opportunity

RFQ 36C24E25Q0045

Advanced Genetic Sequencing Solicitation Clarification and Question & Answer, PART 2

**Quote submission is extended to no later than 11:59AM EST, Thursday, June 26, 2025.**

Quotes shall be submitted via email to millicent.covert@va.gov. Offerors must reference Solicitation 36C24E25Q0045 in the subject line of the email. No telephone requests for information will be considered. Incomplete packages will be considered nonresponsive.

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Response to Question 1: Scope, Library Prep, and Sequencing Capacity

We appreciate your request for clarification and have refined the expectations to ensure alignment with the full Statement of Work (SOW). The following applies:

1. Workflow Scope – Full Single-Cell RNA-seq Services Required

The requirement includes complete execution of the Parse Biosciences single-cell RNA-seq pipeline, starting from fixed single-cell suspensions. This encompasses:

- Sample intake and QC

- Cell barcoding and library preparation using Parse WT or MEGA kits

- Library quality control

- High-throughput sequencing on NovaSeq X Plus PE150 (25B lanes)

- Full bioinformatics pipeline (alignment, clustering, DEG, pathway analysis)

Pre-made libraries are not in scope, and the contractor must have demonstrated experience handling Parse Biosciences workflows end-to-end, including immediate sequencing upon library completion without outsourcing.

2. Library QC and Kit Considerations

Library QC is embedded within the full workflow and must be included in the price per library. The contractor should have:

- Infrastructure and staffing to process up to 20 libraries/year in multiple independent batches (2–6 per shipment)

- Access to and experience with Parse WT and MEGA kits, with the ability to scale per batch and adjust based on submission schedule without delays or combining batches

3. Sequencing Specifications and Lane Requirements

Sequencing must reach 30,000–50,000 PE150 reads per cell in line with Parse’s UMI-based design. The contractor should be able to independently:

- Assess and balance sample pools

- Perform high-throughput sequencing using NovaSeq X Plus

- Deliver per-library and per-cell metrics, not only per-lane summaries

Contractor must control both library prep and sequencing in-house, ensuring minimal sample handoff and continuity of sample metadata.

Response to Question 2: Misalignment Between Pricing Table and Deliverables

We acknowledge that the originally provided table structure may have introduced ambiguity. To ensure it accurately reflects the technical and operational deliverables, we recommend the pricing table be realigned to match the complete workflow.

Recommended Table Format (Reflecting SOW)

Line Item

Qty

Description

0001 Fixed Sample Receipt & Batch Intake

20

Intake, logging, and QC of methanol-fixed single-cell suspensions

0002 Parse Library Prep (WT or MEGA) + QC

20

Barcoding, cDNA synthesis, library prep, Bioanalyzer/Qubit QC

0003 Sequencing – NovaSeq X Plus PE150

TBD

Based on UMI complexity and required depth (30–50K reads per cell)

0004 Data Processing & Bioinformatics

20

UMI alignment, cell clustering, DEG, GSEA, UMAPs, raw & processed outputs

Summary of Key Requirements

To ensure scientific success, the vendor must:

- Handle full Parse Evercode single-cell RNA-seq pipeline internally

- Have proven experience with Parse kits (WT, MEGA) and NovaSeq X Plus

- Support batch-level flexibility (2–6 samples), not pooled 20-sample prep

- Deliver complete sequencing + bioinformatics per sample

- Ensure end-to-end traceability and QC without third-party outsourcing

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RFQ 36C24E25Q0045

Advanced Genetic Sequencing Solicitation Clarification and Question & Answer, PART 2

**Quote submission is extended to no later than 11:59AM EST, Thursday, June 26, 2025.**

Quotes shall be submitted via email to millicent.covert@va.gov. Offerors must reference Solicitation 36C24E25Q0045 in the subject line of the email. No telephone requests for information will be considered. Incomplete packages will be considered nonresponsive.

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