Digitalis purpurea detect DNA or RNA. It can easily be attached to nucleotides by chemical modifications. DIG molecules are often linked to uridine nucleotides; DIG-labeled uridine (DIG-U) can then be incorporated into RNA probes via "in vitro" transcription. Once hybridisation occurs "in situ", RNA probes with the incorporated DIG-U can be detected with anti-DIG antibodies conjugated to alkaline phosphatase. To reveal the hybridised transcripts, alkaline phosphatase can be reacted with a chromogen to produce a coloured precipitate. The colours of the petals of the "Digitalis purpurea" are known to be determined by at least three genes that interact with each other. The
Read's Drug Store two walls; preservationists argued that both plans were insufficient. Activists want the building preserved and turned into a civil rights museum. They accuse the city of "demolition by neglect": avoiding minor repairs and allowing the building to collapse in order to make room for development. Support for preserving the building comes from Baltimore Heritage, a non-profit historical preservation group, and the Jewish Museum of Maryland, which celebrates the Nattans' decision to desegregate early. Read's Drug Store Read's Drug Store was a chain of stores based in Baltimore, Maryland. Read's Drug Store was founded by William Read. He sold it to