• Product name
    Anti-P4HB antibody [PDI-38H8]
    See all P4HB primary antibodies
  • Description
    Mouse monoclonal [PDI-38H8] to P4HB
  • Host species
  • Specificity
    ab30319 recognises P4HB/Protein Disulphide Isomerase (PDIA1).
  • Tested applications
    Suitable for: WB, ICC/IFmore details
  • Species reactivity
    Reacts with: Saccharomyces cerevisiae
  • Immunogen

    Tissue, cells or virus corresponding to Saccharomyces cerevisiae P4HB.
    Database link: P07237



Our Abpromise guarantee covers the use of ab30319 in the following tested applications.

The application notes include recommended starting dilutions; optimal dilutions/concentrations should be determined by the end user.

Application Abreviews Notes
WB 1/1000 - 1/10000. Predicted molecular weight: 57 kDa.
ICC/IF 1/250 - 1/2500.


  • Function
    This multifunctional protein catalyzes the formation, breakage and rearrangement of disulfide bonds. At the cell surface, seems to act as a reductase that cleaves disulfide bonds of proteins attached to the cell. May therefore cause structural modifications of exofacial proteins. Inside the cell, seems to form/rearrange disulfide bonds of nascent proteins. At high concentrations, functions as a chaperone that inhibits aggregation of misfolded proteins. At low concentrations, facilitates aggregation (anti-chaperone activity). May be involved with other chaperones in the structural modification of the TG precursor in hormone biogenesis. Also acts a structural subunit of various enzymes such as prolyl 4-hydroxylase and microsomal triacylglycerol transfer protein MTTP.
  • Sequence similarities
    Belongs to the protein disulfide isomerase family.
    Contains 2 thioredoxin domains.
  • Cellular localization
    Endoplasmic reticulum lumen. Melanosome. Cell membrane. Highly abundant. In some cell types, seems to be also secreted or associated with the plasma membrane, where it undergoes constant shedding and replacement from intracellular sources (Probable). Localizes near CD4-enriched regions on lymphoid cell surfaces. Identified by mass spectrometry in melanosome fractions from stage I to stage IV.
  • Information by UniProt
  • Alternative names
    • Cellular thyroid hormone binding protein antibody
    • Cellular thyroid hormone-binding protein antibody
    • Collagen prolyl 4 hydroxylase beta antibody
    • Disulphide Isomerase antibody
    • DSI antibody
    • EC antibody
    • Endoplasmic reticulum resident protein 59 antibody
    • ER protein 59 antibody
    • ERBA2L antibody
    • ERp59 antibody
    • GIT antibody
    • Gltathione insulin transhydrogenase antibody
    • Glutathione insulin transhydrogenase antibody
    • P4HB antibody
    • P4Hbeta antibody
    • p55 antibody
    • PDI antibody
    • PDIA1 antibody
    • PDIA1_HUMAN antibody
    • PDIR antibody
    • PHDB antibody
    • PO4DB antibody
    • PO4HB antibody
    • Procollagen proline 2 oxoglutarate 4 dioxygenase (proline 4 hydroxylase) beta polypeptide (protein disulfide isomerase associated 1) antibody
    • Procollagen proline 2 oxoglutarate 4 dioxygenase beta subunit antibody
    • PROHB antibody
    • Prolyl 4 hydroxylase beta polypeptide antibody
    • Prolyl 4 hydroxylase beta subunit antibody
    • Prolyl 4 hydroxylase subunit beta antibody
    • Prolyl 4-hydroxylase subunit beta antibody
    • Protein disulfide isomerase associated 1 antibody
    • Protein disulfide isomerase, family A, member 1 antibody
    • Protein disulfide isomerase/oxidoreductase antibody
    • Protein disulfide-isomerase antibody
    • Protocollagen hydroxylase antibody
    • Thbp antibody
    • Thyroid hormone binding protein p55 antibody
    • Thyroid hormone binding protein p55 cellular antibody
    • V erb a avian erythroblastic leukemia viral oncogene homolog 2 like antibody
    see all


ab30319 has not yet been referenced specifically in any publications.

Customer reviews and Q&As

1-2 of 2 Abreviews or Q&A


Thank you for contacting us.

Regrettably, we will not be able to guarantee the anti PDI antibodies cross reactivity towards P. pastoris species. The sequence analysis of ab30319 shows only 45% homology which is very less for antibody cross reactivity. I apologies for any inconvenience.

I hope this information is helpful to you. Please do not hesitate to contact us if you need any more advice or information.

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 Dear technical support team: This customer has already purchased ab30319 (Anti-PDI antibody [PDI-38H8] - ER Marker), and after he conducted IHC with Saccharomyces cerevisiae sample, the result shows no signal, therefore he wants to ask for you help to offer any suggestion to him, and his experiment step as follow:   1) Order details: ˙Batch number ( Lot number): GR57411-1 .po: 952354 ˙ Abcam product code: ab30319   ˙ Antibody storage conditions (temperature/reconstitution etc) : -20℃ or 4℃for short time (no dilution) 2) Please describe the problem (high background, non-specific signal…etc). No signal   ) On what material are you testing the antibody in IHC/ICC? ˙ Species: S. cerevisiae ˙ What’s cell line or tissue: cell   4) Sample preparation: ˙Type of sample (Fresh frozen sections, perfusion fixed frozen sections, PFA/formalin fixed Formalin Fix cell solution ˙paraffin embedded sections, cells in culture, other:) : cell in culture ˙Sample preparation: add 100% formalin into culture solution directly to 10% working ˙ Positive control : no ˙Negative control : no   5) Fixation step ˙Yes or No : Yes ˙ If yes, Fixative agent and concentration: 10% working formalin ˙ Fixation time: 10~45min ˙ Fixation temperature :RT   6) Antigen retrieval method(including time, temperature etc.): no 7) Permeabilization method: ˙ Did you do a permeabilization step (details please) or add permeabilizing agent in any dilution buffers? ˙Permeabilizing agent and concentration: Ice cold Methanol for about 4min and then acetone for about 10Sec Or add 0.03% trition X-100 in PBS for 10min   8) Blocking agent (eg BSA, serum…): ˙Concentration: 2%BSA ˙Blocking time : 30min                        ˙Blocking temperature: RT   9) ˙Endogenous peroxidases blocked? no ˙Endogenous biotins blocked? no 10) Primary antibody (If more than one was used, describe in “additional notes”) : ˙Species: mouse ˙Reacts against: Sc ˙At what dilution(s) have you tested this antibody:1:100~1:600 ˙Diluent buffer:  1%BSA in PBS ˙Incubation time: 1.5hrs or O/N ˙Incubation temperature: RT or 4℃ ˙What washing steps were done (which buffer, number of washes): PBS for 3 time (each time :just a few sec) 11)  Secondary antibody:       ˙Species: sheep ˙ Reacts against which species: mouse ˙At what dilution(s) have you tested this antibody: 1:400~1:800 ˙ Diluent buffer: 1% BSA inPBS ˙ Incubation time: 1hr ˙ What washing steps were done (which buffer, number of washes): PBS for 3 times (each time: just a few sec ˙ Fluorochrome or enzyme conjugate (eg: FITC, HRP, AP, biotin…etc): Cy3 ˙ Do you know whether the problems you are experiencing come from the secondary? Not 12) Signal amplification method (eg: ABC, LSAB, HRP polymer, TSE): No 13) Detection method (eg: DAB, BCIP/NBT …etc): Fluorescence 14)  How many times have you run this staining? About 4 times ˙Do you obtain the same results every time?  Yes ˙ What steps have you altered to try and optimize the use of this antibody? Dilution volume, permeabilizing type, and fix time Document attachment: Just no signal at zeiss 780 confocal   Could you please help this customer to solve the problem? Thanks for your kindly help Best regards

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Thank you for taking the time to complete our questionnaire and contact us. I am sorry to hear you have had difficulty obtaining satisfactory results from this antibody. The details you have kindly provided will provide us with vital information for our monitoring of product quality. I appreciate the time you have spent in the laboratory and understand your concerns. It is regrettable the results have not been successful. Reviewing the details, I am sorry there are no further tips to provide on this occasion to help improve the results. I can suggest you have regrettably received a bad vial. I apologize for the inconvenience and am pleased to offer you a free of charge replacement or credit note in compensation. Thank you for your cooperation. I look forward to hearing from you with details of how you would like to proceed.  

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