Mark Zhai

I design and test new CRISPR-associated proteins with protein language models, then take the candidates to the bench.

Generated Cas12a candidate, residues 1–240 · colored by side-chain class

About

Hi! I am a chemical engineering and computer science graduate, and current research technician in a molecular diagnostics lab at Tulane University School of Medicine. There I lead two computational protein design projects...

I have extensive experience in both computational and experimental biology work, and my goal is to leverage the advantages of both to answer my research questions.

Current Research

Generative design of Cas12a nucleases

Using reinforcement learning to fine-tune a protein language model on the Cas12a family to generate novel nucleases with improved thermostability, specificity, and activity to optimize one-pot CRISPR detection assays.

ProGen2 · AMBER · sequence level filtering · OpenRLHF

Computational nanobody design for difficult targets

Expanding the scope of known computational binder design pipelines to small tryptic and disulfide-rich peptides with improved specificity for detection and neutralization purposes.

RFdiffusion · AlphaFold2 Sequence Hallucination · ProteinMPNN · Rosetta ddG

Transcriptomics of host–pathogen signaling

Bulk RNA-seq analysis supporting the lab's infection biology work, including alignment, quality control, and differential expression pipeline.

STAR · FastQC/MultiQC · featureCounts · DESeq2

Previous Research

Downregulated pathways involved in ZFTA-RELA ependymoma tumorigenesis

Identified key downregulated pathways implicated in ZFTA-RELA ependymoma tumorigenesis, corroborated by their presence in in-vitro and in-vivo models.

bulk RNA-seq analysis · ChIP-seq analysis · R

Automated MRI tumor segmentation for fast tumor volume quantification

Built and trained a U-Net convolutional neural network to automate unbiased MRI tumor segmentation for fast tumor volume quantification.

PyTorch · CNN · Slicer · Python

IGF2 secretion as a mechanism of ZFTA-RELA ependymoma tumorigenesis

Constructed growth curves for multiple patient-derived xenograft ependymoma models to measure the effects of IGF2 treatment.

Cell culture · Western blot · ELISA · PCR · RNA extraction

Publications

  1. Zhai, M., Coauthor, A., & Ning, L. Title of the manuscript goes here. Journal or preprint server, 2026. DOI
  2. Coauthor, A., Zhai, M., & Ning, L. Title of an earlier paper. Journal, 2025. DOI

Experience

  1. 2025 — present Research TechnicianTulane University School of Medicine
  2. 2023 — 2025 Undergraduate Researcher, protein engineeringTulane University, Department of Chemical Engineering
  3. 2021 — 2023 Summer Research InternSt. Jude Children's Research Hospital
  4. 2021 — 2025 B.S. Chemical Engineering and Computer ScienceTulane University