Plant/Algal cell antibodies / Photosynthesis / PSII (Photosystem II)

product information

PsbB (CP47) is a chlorophyll-binding protein located in the membrane, where it serves as the core antenna of Photosystem II.

KLH-conjugated synthetic peptide derived from available plant, algal and cyanobacterial PsbB sequences including Arabidopsis thaliana AtCg00680, Hordeum vulgare P10900, Oryza sativa P0C364, Synechocystis PCC 6803 P05429

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.

western blot (WB)

AS04 038S | PsbB protein standard for quantitation and positive control is discontinued. We recommend to use  PsbD | D2 together with PsbD antibody

antibodies to other PSII proteins

recommended secondary antibody

to be added when available

application information

1: 2000 (WB)

56 kDa

Arabidopsis thaliana, Hordeum vulgare, Physcomitrella patens, Chlamydomonas reinhardtii, Synechococcus PCC7942, 6803, Anabaena 7120, diatoms

dicots including Pisum sativum, Glycine max and monocots inluding Oryza sativa, conifers, algae, cyanobacteria

no confirmed exceptions from predicted reactivity known in the moment

in bis-tris gel systems PsbB protein migrates between 40-45 kDa

Yamamuchi et al. (2011). Plants switch photosystem at high temperature to protect photosystem II. Nature Proceedings in press.

Yoshioka et al. (2010).  Quality control of photosystem II: FtsH hexamers are localized near photosystem II at grana for the swift repair of damage. J Biol Chem 285(53): 41972-41981.

application example

2 µg of total protein from (1) Arabidopsis thaliana leaf extracted with PEB (AS08 300), (2) Horderum vulgare leaf extracted with PEB (AS08 300), (3) Chlamydomonas reinhardtii total cell extracted with PEB (AS08 300), (4) Synechococcus sp. 7942 total cell extracted with PEB (AS08 300), (5) Anabaena sp. total cell extracted with PEB (AS08 300) were separated on  4-12% NuPage (Invitrogen) LDS-PAGE and blotted 1h to PVDF. Blots were blocked immediately following transfer in 2% ECL Advance blocking reagent (GE Healthcare) in 20 mM Tris, 137 mM sodium chloride pH 7.6 with 0.1% (v/v) Tween-20 (TBS-T) for 1h at room temperature with agitation. Blots were incubated in the primary antibody at a dilution of 1: 50 000 for 1h at room temperature 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 room temperature with agitation. Blots were incubated in secondary antibody (anti-rabbit IgG horse radish peroxidase conjugated, recommended secondary antibody AS09 602) diluted to 1:50 000 in 2% ECL Advance blocking solution for 1h at room temperature with agitation. The blots were washed as above and developed for 5 min with ECL Advance detection reagent according the manufacturers instructions. Images of the blots were obtained using a CCD imager (FluorSMax, Bio-Rad) and Quantity One software (Bio-Rad).

application example

0.2 µg of chlorophyll from (4,5) Arabidopsis thaliana leaf extracted with PEB (AS08 300), (1) 500 fmol of PsbB protein standard, (2) 200 fmol of PsbB protein standard, (3) 75 fmol of PsbB protein standard  were separated on  4-12% NuPage (Invitrogen) LDS-PAGE and blotted 1h to PVDF. Blots were blocked immediately following transfer in 2% ECL Advance blocking reagent (GE Healthcare) in 20 mM Tris, 137 mM sodium chloride pH 7.6 with 0.1% (v/v) Tween-20 (TBS-T) for 1h at room temperature with agitation. Blots were incubated in the primary antibody at a dilution of 1: 50 000 for 1h at room temperature 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 room temperature with agitation. Blots were incubated in secondary antibody (anti-rabbit IgG horse radish peroxidase conjugated, from Abcam) diluted to 1:50 000 in 2% ECL Advance blocking solution for 1h at room temperature with agitation. The blots were washed as above and developed for 5 min with ECL Advance detection reagent according the manufacturers instructions. Images of the blots were obtained using a CCD imager (FluorSMax, Bio-Rad) and Quantity One software (Bio-Rad).