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Summary This antibody specifically interacts with the trimeric structure of laminin-511 isoform but does not react with any of the alpha 5, beta 1 and gamma 1 chains in the reducing conditions. Furthermore, it has been validated that clone 12D does not react with any of laminins-111, -211, -332, -3B32, -411 and -521. Unlike conventional anti- alpha 5 antibodies, clone 12D distinguishes laminin-511 from laminin-521.

Summary This antibody reacts with the highly conserved heptapeptide repeat of the largest subunit of eukaryotic RNA polymerase II. It inhibits promoter- directed transcription, but it does not inhibit elongation in the nonspecific transcription assay.