Products:Microbiology >> Organism >> Virus >> DNA Virus >> double stranded DNA Virus >> Other dsDNA viruses
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All lanes : Anti-KSHV ORF45 antibody [2D4A5] (ab36618)
Lane 1 : Molecular weight marker
Lane 2 : Recombinant KSHV ORF45 expressed in E.coli
Predicted band size : 50 kDa
Observed band size : 78 kDa (why is the actual band size different from the predicted?)
Based on the analysis of the mRNA sequence, ORF45 is expected to encode a protein of 407 amino acids with a molecular mass of about 50 kDa. However, ORF45 was displayed as a diffuse band at the position of 78 kDa on a Western blot after SDS-PAGE. This observation implied that ORF45 might be highly post-translationally modified, resulting in its reduced mobility in denaturing SDS-PAGE. A survey of the primary amino acid sequence of ORF45 revealed multiple potential sites of phosphorylation, including a serine-rich region and other consensus sites for phosphorylation by the serine/threonine kinase, casein kinase II, and protein kinase C (Zhu & Yuan, 2003).
Immunochemistry staining of TPA-induced BCBL-1 cells, using ab36618. HRP-anti-mouse was used as the secondary antibody before colour development with DAB.
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