TIVA is a protocol that captures mRNA from live cells. In this method, a photoactivatable TIVA tag is loaded into cells. Selective photoactivation exposes the mRNA-capturing portion of the tag, allowing it to hybridize to the poly(A) tails of mRNA. The biotin-bound mRNA is captured using streptavidin-coated magnetic beads and transcribed into cDNA. Sequencing the cDNA provides transcriptome analysis of RNA from single cells in complex tissues.