A negative Biuret's test appears this color. It's not green, but a light of this color is used to illuminate SYBR green stained gels, and a fluorescent protein of this color serves as the donor protein in a commonly used FRET pair, with YFP. Proteins turn this color in the Bradford assay, which turns a dye named for Coomassie from brown to this color. Indium and arsenic give this color on a flame test, and due to electron solvation, solutions of alkali metals in ammonia have this color. A universal indicator takes on this color between pH 8 and 11, and particular bromophenol and bromothymol derivatives used as indicators turn this color at basic pH. Pigments of this color are often made from cobalt salts. For 10 points, name this color, which in ball-and-stick organic models is often assig
A negative Biuret's test appears this color. It's not green, but a light of this color is used to illuminate SYBR green stained gels, and a fluorescent protein of this color serves as the donor protein in a commonly used FRET pair, with YFP. Proteins turn this color in the Bradford assay, which turns a dye named for Coomassie from brown to this color. Indium and arsenic give this color on a flame test, and due to electron solvation, solutions of alkali metals in ammonia have this color. A universal indicator takes on this color between pH 8 and 11, and particular bromophenol and bromothymol derivatives used as indicators turn this color at basic pH. Pigments of this color are often made from cobalt salts. For 10 points, name this color, which in ball-and-stick organic models is often assigned to nitrogen.
A negative Biuret's test appears this color. It's not green, but a light of this color is used to illuminate SYBR green stained gels, and a fluorescent protein of this color serves as the donor protein in a commonly used FRET pair, with YFP.
blue [or cyan; or purple; or violet]