OOIR: Observatory of International Research

Papers

(The TQCC of Protein Expression and Purification is 4. The table below lists those papers that are above that threshold based on CrossRef citation counts [max. 250 papers]. The publications cover those that have been published in the past four years, i.e., from 2022-05-01 to 2026-05-01.)

Article	Citations
A simple freeze-thaw based method for efficient purification of recombinant human proinsulin from inclusion bodies	75
Protein inclusion into ice can dissociate subunits	21
Alocasia macrorrhiza rhizome lectin inhibits growth of pathogenic bacteria and human lung cancer cell in vitro and Ehrlich ascites carcinoma cell in vivo in mice	20
Screening, expression and anti-tumor functional identification of anti-LAG-3 nanobodies	19
Protein expression and purification, molecular interaction, and X-ray crystallographic analysis of baculovirus protein PK2	19
Highly efficient overexpression and purification of multisubunit tethering complexes in Saccharomyces cerevisiae	18
The heat-labile toxin B subunit of E. coli fused with VP6 from GCRV (Grass carp reovirus) was expressed and folded into an active protein in rice calli	17
Efficient expression and purification of tag-free recombinant human procalcitonin (hPCT) with precise sequence in E. coli	16
SEC-HPLC analysis of column load and flow-through provides critical understanding of low Protein A step yield	15
Optimization of the expression of the main protease from SARS-CoV-2	14
Expression, purification and characterization of SARS-CoV-2 spike RBD in ExpiCHO cells	14
Isolation, expression, and characterization of potato (Solanum tuberosum) GH family 17 β-1,3-glucanase (Stglu) for exploring its potential as an antifungal agent	13
Production of VP3-only virus-like particles of Adeno-associated virus 2 in E. coli cells	13
Removal of polysorbates degradation-related impurities by depth filter screening: A case study	13
Editorial Board	13
Evaluation of the paired-Cas9 nickase and RNA-guided FokI genome editing tools in precise integration of an anti-CD52 bicistronic monoclonal antibody expression construct at Chinese hamster ovary cell	13
Editorial Board	12
Establishment of purification method for prokaryotic expression of Serpin gene for Dermatophagoides farinae	12
Expression and characterization of a lipase EstA from Bacillus subtilis KM-BS for application in bio-hydrolysis of waste cooking oil	11
High-yield and cost-effective biosynthesis process for producing antimicrobial peptide AA139	11
Simplified purification process of AsnB3 deamidated insulin variant and its comparison with human insulin	11
Editorial Board	10
Production and compositional analysis of full-length influenza virus hemagglutinin in Nanodiscs: Insights from multi-angle light scattering	10
Expression, purification, and microscopic characterization of the tumor suppressor KLHL6	10
The N-terminal polypeptide of a new shell matrix protein hicraqin accelerates the rate of calcium carbonate deposition	10

Highly efficient protein expression of Plasmodium vivax surface antigen, Pvs25, by silkworm and its biochemical analysis	10
High performance production process development and scale-up of an anti-TSLP nanobody	9
Purification of the HBV middle protein by two simple steps, application of ion exchange chromatography to improve protein homogeneity	9
Purification and characterization of the intrinsically disordered Arabidopsis thaliana protein SOG1	9
Preparation and characterization of LGR5 LOOP region-specific nanobodies	9
Optimized vector for functional expression of the human bitter taste receptor TAS2R14 in HEK293 cells	9
Polycistronic baculovirus expression of SUGT1 enables high-yield production of recombinant leucine-rich repeat proteins and protein complexes	9
Optimization of genetic code expansion in the baculovirus expression vector system (BEVS)	8
Assessing four subdomain-specific affinity resins’ capability to separate half-antibody from intact bispecific antibody	8
Efficient heterologous expression of cellobiose 2-epimerase gene in Escherichia coli under the control of T7 lac promoter without addition of IPTG and lactose	8
Strategies for rapid production of crystallization quality coatomer WD40 domains	8
The long chain fatty acid-CoA ligase VraA plays a regulatory role in vancomycin resistance in Staphylococcus aureus	8
Intracytoplasmic sperm injection-mediated strategy for the production of transgenic poultry as a bioreactor	8
Molecular cloning and functional analysis of a destabilase from Hirudinaria manillensis	8
Novel (R)-Hydroxynitrile lyase enzyme of Pyrus communis: Purification and characterization of its physicochemical and kinetic properties	8
L-arginine interferes with functional studies of amyloid proteins	8
Editorial Board	7
Production of recombinant human ameloblastin by a fully native purification pathway	7
An important consideration when expressing mAbs in Escherichia coli	7
Development of an effective method for purifying trypsin using a recombinant inhibitor	7
Molecular chaperone GroEL-GroES enhances the soluble expression of biologically active ovine growth hormone in the prokaryotic system	7
Scalable production and characterization of recombinant pneumococcal histidine triad protein D in Escherichia coli for vaccine development	7
One-step metal affinity purification of recombinant hFGF19 without using tags	7
Enhanced performance of Thermococcus kodakarensis KOD1 polymerase in PCR via fusion to Sulfolobus tokodaii Sto7d	7
Bacterial expression, purification and characterization of the human Dectin-1 lectin domain for structural and functional studies	7
Modulation of N-glycosylation in bispecific antibody biosimilars through combined modulators	7
Validation of cold shock-based technique for purification of recombinant C. elegans Phosphodiesterase 3 protein expressed in E. coli	7
Novel anti-NS1 human single domain antibody from dengue infected NS1 positive patients	7
Purification and characterization of recombinant human superoxide dismutase integrated with resilin-like polypeptide	7
Expression, characterization and anti-colon cancer activity of recombinant ginseng peptides with amino acid tandem repeats	7
Editorial Board	6
Soluble expression of hMYDGF was improved by strain engineering and optimizations of fermentation strategies in Escherichia coli	6
Analysis of the in vitro function and internalization ability of a humanized EGFR antibody AE01 expressed by Chinese hamster ovary cells	6
Identification of chitinase from Bacillus velezensis strain S161 and its antifungal activity against Penicillium digitatum	6
Facile purification of active recombinant mouse cytosolic carboxypeptidase 6 from Escherichia coli	6
Development and expression of a factor X-derived recombinant protein for ELISA-based detection of Emicizumab	6
Expression and purification of Drosophila OBP44a with the aids of LC-MS and NMR	6
Biochemical characterization of a novel bifunctional alginate lyase from Microbulbifer arenaceous	6
Recombinant human FOXJ1 protein binds DNA, forms higher-order oligomers, has gel-shifting domains and contains intrinsically disordered regions	6
The construction of long-acting exendin-4 analog and its hypoglycemic effect in diabetic mice	6
A rapid procedure to generate stably transfected HEK293 suspension cells for recombinant protein manufacturing: Yield improvements, bioreactor production and downstream processing	6
Overproduction, purification, and transcriptional activity of recombinant Acinetobacter baylyi ADP1 RNA polymerase holoenzyme	6
Optimized high-yield preparation of alkaline-solubilizable crystalline inclusion of the Bacillus thuringiensis Cry4Aa δ-endotoxin expressed in Escherichia coli	6
Multiple optimizations of recombinant plasmid for improving expression of Hepatitis B core antigen in Escherichia coli	6
A multidomain PARP14 construct suitable for bacterial expression	6
Synthesis of BLF1-containing trimethyl chitosan nanoparticles and evaluation of its immunogenicity and protection in syrian mice by oral and subcutaneous injections	6
Editorial Board	6
Solvent extraction of recombinant interferon alpha-2b from inclusion bodies and efficient refolding at high protein concentrations	6
Dual display hemagglutinin 1 and 5 on the surface of enveloped virus-like particles in silkworm expression system	6
Advantage of leaky expression, acid solubilization and CHAPS in the production of cost-effective bone morphogenetic Protein-2	6

Differentially labeled flaviviral protease-cofactor complex for NMR spectroscopic applications	5
Uncovering the role of leucine 59 in Renilla luciferase stability and activity with error-prone PCR: Implications for protein engineering	5
Affinity gel synthesis from the p-aminobenzoic acid derivative 4-amino-2-methylbenzoic acid and purification of polyphenol oxidase from various plant sources	5
Optimized expression and purification of a human adenosine deaminase in E. coli and characterization of its Asp8Asn variant	5
Preparation of recombinant neuritin protein	5
Zymography assisted quick purification, characterization and inhibition analysis of K. pneumoniae alkaline phosphatase by mercury and thiohydroxyal compounds	5
Enhanced production of stem bromelain in Pichia pastoris by coexpression of unfolded protein response activator gene HAC1P	5
Development of a bispecific Nanobody anti-F17 fimbria as a potential therapeutic tool	5
Effective expression and characterization of the receptor binding domains in SARS-CoV-2 Spike proteins from original strain and variants of concern using Bombyx mori nucleopolyhedrovirus in silkworm	5
Unlocking the potential of Extensin Signal peptide and Elastin-like polypeptide tag fused to Shigella dysenteriae's IpaDSTxB to improve protein expression and purification in Nicotiana tabacum and Med	5
Purification of recombinantly produced somatostatin-28 comparing hydrochloric acid and polyethyleneimine as E. coli extraction aids	5
Efficient and economical purification platform for production of therapeutic nanobodies	5
Editorial Board	5
Construction of a novel TROP2/CD3 bispecific antibody with potent antitumor activity and reduced induction of Th1 cytokines	5
Navigating the Frontier: Advances in monoclonal antibody purity control	5
High yield expression and purification of full-length Neurotensin with pyroglutamate modification	5
Development of magnetic particle-based chemiluminescence immunoassay for quantitative determination of hepatitis C virus core antigen	5
Deepening in the understanding of the role of collagen subunits on the differential molecular arrangement of P. glauca and M. merluccius marine collagens	5
Preparation and characterization of a novel humanized collagen III with repeated fragments of Gly300-Asp329	5
Expression of recombinant swine ferritin heavy chain with enhanced solubility in Escherichia coli and simplified purification of ferritin nanoparticles	5
Strategies for manufacturing soluble human alphainterferons in Escherichia coli: expression, purification, and testing	5
Expression, purification, characterization and crystallization of Panax quinquefolius ginsenoside glycosyltransferase Pq3-O-UGT2	5
Escherichia coli as a versatile cell factory: Advances and challenges in recombinant protein production	5
Soluble expression and purification of recombinant bovine ferritin H-chain	5
Corrigendum to “High-affinity nanobodies targeting IL-12B for the detection of fluorescence resonance energy transfer” [Protein Express. Purificat. 229 (2025) 106681]	5
Effective and robust separation of half-antibody byproduct in bispecific antibody purification by Sartobind Rapid A Protein A membrane chromatography	5
A novel method for synthesizing authentic SARS-CoV-2 main protease	4
Functional expression of the chimera proteins of Nav1.7 and NavAb in Escherichia coli	4
Identification of host cell proteins that interact with the M protein of Pigeon paramyxovirus type 1	4
Sterile chicken hosts for germline transmission: A review of recipient preparation strategies in avian biotechnology	4
Robust aggregate separation by Sartobind Rapid A Protein A membrane	4
Recombinant expression of antimicrobial peptide AMP-PD as tandem octamer and its antibacterial activity in vitro	4
A comprehensive method for modeling and simulating ion exchange chromatography of complex mixtures	4
Enhanced production of functional CRISPR-AsCas12a protein in Escherichia coli	4
A streamlined, automated workflow to screen and triage large numbers of baculoviruses for protein expression	4
A procedure for producing an anti-AXL nanobody in E. coli	4
Mini review for niche downstream processes	4
Time- and cost-efficient bacterial expression and purification of potato apyrase	4
Expression, purification and characterization of the transcription termination factor Rho from Azospirillum brasilense	4
Characterization of a halotolerant GH2 family β-galactosidase GalM from Microvirga sp. strain MC18	4
Expression and functional characterization of recombinant soluble CD40 Ligand in prokaryotic systems	4
Partition coefficient screening – An effective approach for finding the best conditions for byproduct removal as demonstrated by a bispecific antibody purification case	4
Fine-tuning of leaky expression delivers soluble and functional recombinant alphainterferon in the cytoplasm of Escherichia coli	4
Antibody-mimetic drug conjugate with efficient internalization activity using anti-HER2 VHH and duocarmycin	4
Bench-top NMR of water signals: A non-destructive tool for biomacromolecule characterization	4
Modular cell line for scalable and rapid in vitro evaluation of chimeric antigen receptors	4
Development of efficient modules for recombinant protein expression and periplasmic localisation in Pseudomonas bharatica CSV86T	4
Improved production of class I phosphatidylinositol 4,5-bisphosphate 3-kinase	4
A new trypsin inhibitor from Centrosema plumieri effective against digestive proteases from Tribolium castaneum, an eco-friendly alternative	4
CUREs for high-level Galectin-3 expression	4
Editorial Board	4
Mass production and characterization of an endoglucanase from Coleoptera insect (Monochamus saltuarius) in yeast Kluyveromyces lactis	4
Purification and comparison of soluble and membrane-bound polyphenol oxidase from potato (Solanum tuberosum) tubers	4
Editorial Board	4
Hyper-expression of GFP-fused active hFGF21 in tobacco chloroplasts	4
Expression of a human Gb3/CD77 synthase in insect and human cells: comparison of activity and glycosylation	4
Metal binding feature of copper‒induced metallothionein from freshwater crab Sinopotamon henanense reveals its Cu‒thionein character	4
Bioinformatics analysis and polyclonal antibody preparation of Mesocricetus auratus DHX30	4
A new combination approach to extracellular production of 5-aminolevulinic acid for purification and application in alleviating cadmium-induced oxidative stress in maize	4
The superiority of MabSelect VL, Cytiva's second-generation Protein L resin, over three other affinity resins in purifying a VHH-containing trispecific antibody	4
Heterologous expression, purification, and partial characterisation of the apicoplast protein 3-oxoacyl-[acyl-carrier-protein] reductase from Toxoplasma gondii	4
A recombinant human SLPI variant suppresses the formation of neutrophil extracellular traps at low concentrations in vitro	4
Purification and characterization of an asialofetuin specific lectin from the rhizome of Xanthosoma violaceum Schott	4
Study on the hole and knob related impurities in the purification of bispecific antibodies	4
Engineering an optimized expression operating unit for improved recombinant protein production in Escherichia coli	4