Who is a Jew? familiar with and willing to vouch for the Jewishness of their maternal lineage or the validity of their conversion. There have been several attempts to convene representatives of the three major movements to formulate a practical solution to this issue. To date, these have failed, though all parties concede the importance of the issue is greater than any sense of rivalry among them. Ethnic Jew is a term generally used to describe a person of Jewish parentage and background who does not necessarily actively practice Judaism, but still identifies with Judaism or other Jews culturally or fraternally, or both. The
Brefeldin A studying membrane traffic and [[Vesicle (biology and chemistry)|vesicle]] transport dynamics between the endoplasmic reticulum and Golgi apparatus. Brefeldin A is found naturally as a white to off-white [[crystal]]line solid. It forms a clear colorless solution when dissolved. It is soluble in [[methanol]] (10 mg/mL), [[ethanol]] (5 mg/mL), [[Dimethyl sulfoxide|DMSO]] (20 mg/mL), [[acetone]], and [[ethyl acetate]] (1 mg/mL) without the aid of heating. It is poorly soluble in water (slightly [[Miscibility|miscible]]). It is sold commercially with a purity of 98% or greater. It is recommended that it be stored desiccate at -20 °C away from direct sunlight. Its suggested shelf life