RbcL | Rubisco large subunit, form I (rabbit)

AS03 037 | Clonality: Polyclonal  |  Host: Rabbit  |  Reactivity: [global antibody] for higher plants, lichens, algae, cyanobacteria, dinoflagellates, diatoms 

compartment marker  of chloroplast stroma in higher plants and cytoplasm in cyanobacteria

RbcL | Rubisco large subunit, form I (rabbit) in the group Antibodies for Plant/Algal  / Global Antibodies at Agrisera AB (Antibodies for research) (AS03 037)


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Product Information


KLH-conjugated synthetic peptide conserved across all known plant, algal and cyanobacterial RbcL protein sequences (form I L8S8 and form II L2), including, Arabidopsis thaliana O03042, Hordeum vulgare P05698, Oryza sativa P0C510, Chlamydomonas reinhardtii P00877, Synechococcus PCC 7920 A5CKC5

Host Rabbit
Clonality Polyclonal
Purity Serum
Format Lyophilized
Quantity 50 µl
Reconstitution For reconstitution add 50 µl of sterile water.
Storage Store lyophilized/reconstituted at -20°C; once reconstituted make aliquots to avoid repeated freeze-thaw cycles. Please, remember to spin tubes briefly prior to opening them to avoid any losses that might occur from lyophilized material adhering to the cap or sides of the tubes.
Tested applications Immunofluorescence/confocal Immunolocalization (IL) (IF), Immunogold (IG), Tissue Printing (TP), Western blot (WB)
Recommended dilution

Immunofluorescence/confocal microscopy (IF), 1: 1000 (IG), 1: 250 for images see Prins et al. (2008), detailed protocol available on request,  1: 800 (TP), 1: 5000 - 10 000 (WB)

Expected | apparent MW

52.7 kDa (Arabidopsis thaliana), 52.5 kDa (cyanobacteria), 52.3 (Chlamydomonas reinhardtii)


Confirmed reactivity Agostis stolonifera cv. ‘Penncross’, Arabidopsis thaliana, Apium graveolens, Artemisia annua, Attheya longicornis, Baculogypsina sphaerulata (benthic foraminifer), Beta vulgaris, Begonia sp., Bienertia sinuspersici, Brassica napus, Kandelia candel, Cannabis sativa L.,  Chaetoceros furcellatus, Colobanthus quitensis, Cicer arietinum, Chlamydomonas raudensis, Chlamydomonas reinhardtii, Colobanthus quitensis Kunt Bartl,  Chlorella sorokiniana, Chlorella vulgaris, Coscinodiscus concinnus, Cyanophora paradoxa, Cylindrospermopsis raciborskii CS-505, Cynara cardunculus, Emiliana huxleyi, Euglena gracilis, Ficus carica, Fortunella margarita Swingle, Fraxinus mandshurica, Fucus vesiculosus, Gladieria sulphuraria, Glycine max, Gonyaulax polyedra, Guzmania hybrid, Heterosigma akashiwo, Hevea, Hordeum vulgare, Jatropha curcas, Karenia brevis (C.C.Davis) s) G.Hansen & Ø.Moestrup (Wilson isolate), Lathyrus sativus, Liquidambar formosana, Malus domestica, Medicago truncatula, Micromonas pusila, Nicotiana benthamiana, Nicotiana tabacum, Panicum virgatum, Petunia hybrida cv. Mitchell, Phaeodactylum tricornutum, Physcomitrella patens, Pisum sativum, Porosira glacialis,, Porphyra sp., Ricinus communis, Robinia pseudoacacia, Saccharum sp., Schima superba, Skeletonema costatum (diatom), Skeletonema marinoi (diatom), Stanleya pinnata, Spinacia oleracea, lichens, Symbiodinium sp., Synechococcus PCC 7942, Synechococcus elongatus UTEX 2973, Rhoeo discolor, Thalassiosira pseudonana, Thermosynechococcus elongatus, Triticum aestivum, Prochlorococcus sp. (surface and deep water ecotype), Triticum aestivum, dinoflagellate endosymbionts (genus Symbiodinium), extreme acidophilic verrucomicrobial methanotroph Methylacidiphilum fumariolicum strain SolV, Thalassiosira punctigera, Tisochrysis lutea, Verbascum lychnitis, Vitis vinifera, Quercus ilex
Predicted reactivity Alpha proteobacteria, Algae (brown and red), Dicots, Benincasa hispida, Beta-proteobacteria, Chlorella vulgaris, Conifers, Cryptomonads, Cyanobacteria (prochlorophytes), Gamma-proeobacteria, Liverworts, Manihot esculenta, Monocots, Mosses, Suaeda glauca, Welwitschia; Nannochloropsis sp., Zosteria marina

For detection in Rhodospirillaceae use product AS15 2955
Species of your interest not listed? Contact us
Not reactive in No confirmed exceptions from predicted reactivity are currently known.

Application examples

Application examples

Application example

Western blot

RbcL western blot

0.25 µg of chlorophyl a/lane from Spinacia oleracea (1), Synechococcus PCC 7942 (2), Cyanophora paradoxa (3), Heterosigma akashiwo (4), Thalassiosira pseudonana (5), Euglena gracilis (6), Micromonas pusilla (7), Chlamydomonas reinhardtii (8), Porphyra sp (9), Gonyaulax polyedra (10), Emiliania huxleyi (11) extracted with PEB (AS08 300), were separated on  4-12% NuPage (Invitrogen) LDS-PAGE and blotted 1h to nitrocellulose. Filters were blocked 1h with 2% low-fat milk powder in TBS-T (0.1% TWEEN 20) and probed with anti-RbcL antibody (AS03 037, 1:50 000, 1h) and secondary anti-rabbit (1:20000, 1 h) antibody (HRP conjugated, recommended secondary antibody AS09 602) in TBS-T containing 2% low fat milk powder. Antibody incubations were followed by washings in TBS-T. All steps were performed at RT with agitation. Blots were developed for 5 min with ECL Advance detection reagent according the manufacturers instructions (GE Healthcare). Images of the blots were obtained using a CCD imager (FluorSMax, Bio-Rad) and Quantity One software (Bio-Rad). 

fluorescent western blot detection of Rubisco

1 µg of chlorophyll from Cryptophyte samples (1,2) and 1 µg of chlorophyll (3) or 10 µg of total protein (4) from Arabidopsis thaliana leaves extracted either with 2ml of 100 mM TrisHCl, 50 mM EDTA, 250 mM NaCl, 0.05% SDS (Sample 1) or 10 mL of 50 mM Hepes-KOH (pH 7.8), 330 mM sorbitol, 10 m EDTA, 5 mM NaCl, 5 mM MgCl2, 5 mM sodium ascorbate and 0.2% BSA (Sample 2). Samples were denatured with 1:1 Amersham WB Loading Bufferv at 70C for 10 min and were separated on pre-casted 13.5% Amersham WB gel and blotted for 30 min to Amersham WB PVDF using wet transfer. Blots were blocked with 2% Amersham ECL Blocking Agent for 1h at room temperature (RT) with agitation. Blot was incubated in the primary antibody at a dilution of 1: 10 000 (rabbit anti-Rubisco AS03 037) for 1.5 h at RT with agitation. The antibody solution was decanted and the blot was rinsed briefly twice, then washed once for 15 min and 3 times for 5 min in TBS-T at RT with agitation. Membrane was cut in half and left part was incubated in anti-rabbit DyLight® 550 secondary antibody from Agrisera (AS11 1782) diluted to 1:2 000 in TBST for 1h at RT with agitation. The blot was scanned using Cy3 channel of Amersham WB System.

 Courtesy Dr. Małgorzata Wessels, Agrisera

example of Rubisco quantitation
2 µg of total protein
from various plant extracts  (1-5) extracted with PEB (AS08 300)  separated on  4-12% NuPage (Invitrogen) LDS-PAGE and blotted 1h to PVDF. Markers MagicMarks (Invitrogen) (M) and  Rubisco protein standard (AS01 017S) at 0.0625 pmol, 0.125 pmol, 0.25 pmol.

Following standard western blot procedure this image has been obtained using a CCD imager (FluorSMax, Bio-Rad) and Quantity One software (Bio-Rad).  The contour tool of the software is used to the area for quantitation and the values are background subtracted to give an adjusted volume in counts for each standard and sample.

Note: Optimal quantitation is achieved using moderate sample loads per gel lane, generally 0.5 to 2.5 ug total protein, depending on the abundance of the target protein.

Additional information

Additional information Anti-RbcL can be used as a cellular [compartment marker] of plastid stroma (cytoplasm in cyanobacteria) and detects RbcL protein from 31.25 fmoles. As both forms (I and II) are detected it is suitable for work with samples from Dinoflagellates, Haptophytes and Ochrophytes (diatoms, Raphidophytes, brown algae) as well as higher plants. This antibody together with Agrisera Rubisco protein standard is very suitable to quantify Rubisco in plant and algal samples.Example of a simulataneous western blot detection with RbcL, PsbA and PsaC antibodies.

This product can be sold containing ProClin if requested.

This antibody was used in:

Immunocytochemical staining of diatoms according to Schmid (2003) J Phycol 39: 139-153 and Wordemann et al. (1986) J Cell Biol 102: 1688-1698.

Immunofluorescence Dreier et al. (2012). FEMS Microbial Ecol., March 2012.

Western blot and tissue printing during a student course Ma et al. (2009).

As a loading control Sun et al. (2020).

Protocol for Rubisco quantification using this antibody can be found here.

Related products

Related products

AS03 037A | Anti-RbcL | Rubisco large subunit, form I and form II (50 µg affinity purified), rabbit antibodies
AS03 037-HRP| Anti-RbcL | Rubisco large subunit, form I and form II (40 µg, HRP-conjugated), rabbit antibodies
AS15 2955
| Anti-RbcL II | Rubisco large subunit, form II (50 µl), rabbit antibodies
AS15 2955S | RbcL II | Rubisco form II positive control/quantitation standard
AS01 017  | Anti-RbcL | Rubisco large subunit, form I, chicken antibodies
AS01 017S | Rubisco protein standard for quantitative western blot or positive control
AS03 037PRE | Rubisco large subunit, pre-immune serum
AS09 409 | Rubisco quantitation kit
AS15 2994 | Rubisco ELISA quantitation kit 
AS07 218  | Anti-Rubisco | 557 kDa hexadecamer, rabbit antibodies to a whole protein
AS07 259 | Anti-RbcS | Rubisco small subunit (SSU), rabbit antibodies

Plant and algal protein extraction buffer



This antibody is especially suitable for quantifying of Rubisco in plant and algal samples.

Rubisco (Ribulose-1,5-bisphosphate carboxylase/oxygenase) catalyzes the rate-limiting step of CO2 fixation in photosynthetic organisms. It is demonstrably homologous from purple bacteria to flowering plants and consists of two protein subunits, each present in 8 copies. In plants and green algae, the large subunit (~55 kDa) is coded by the chloroplast rbcL gene, and the small subunit (15 kDa) is coded by a family of nuclear rbcS genes.

Product citations

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Sun et al. (2021). A molecular switch in sulfur metabolism to reduce arsenic and enrich selenium in rice grain. Nat Commun. 2021 Mar 2;12(1):1392. doi: 10.1038/s41467-021-21282-5. PMID: 33654102; PMCID: PMC7925690. (Loading Control)
Li et al. (2021) Isolation and comparative proteomic analysis of mitochondria from the pulp of ripening citrus fruit. Hortic Res. 2021 Feb 1;8(1):31. doi: 10.1038/s41438-021-00470-w. PMID: 33518707; PMCID: PMC7848011.
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Kurmayer et al. (2020). Chemically labeled toxins or bioactive peptides show a heterogeneous intracellular distribution and low spatial overlap with autofluorescence in bloom-forming cyanobacteria. Sci Rep. 2020 Feb 17;10(1):2781. doi: 10.1038/s41598-020-59381-w. (Immunofluorescence)
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Schober et al. (2019). Organelle Studies and Proteome Analyses on Mitochondria and Plastids Fractions from the Diatom Thalassiosira pseudonana. Plant Cell Physiol. 2019 Jun 10. pii: pcz097. doi: 10.1093/pcp/pcz097.
Lacour et al. (2019). Decoupling light harvesting, electron transport and carbon fixation during prolonged darkness supports rapid recovery upon re-illumination in the Arctic diatom Chaetoceros neogracilis. Polar Biol (2019).
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Pao et al. (2018). Lamelloplasts and minichloroplasts in Begoniaceae: iridescence and photosynthetic functioning. J Plant Res. 2018 Mar 2. doi: 10.1007/s10265-018-1020-2. (ImmunoGold)
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