CA 19-9 Human Protein

Specifications

Product Data
Description	CA 19-9 human protein, 50 kU
Species	Human
Protein Source	Cell culture
Concentration	lot specific
Purity	Relative purity ratio: 281,897 Units/ml/OD280nm.
Buffer	Presentation State: Purified State: Liquid (0.2 µm filtered) purified protein Buffer System: PBS, pH 7.4 ± 0.02 containing 0.09% Sodium Azide as preserative.
Bioactivity	Specific: 93,380 Units/ml (Centocor RIA 19-9 Assay)
Preparation	Liquid (0.2 µm filtered) purified protein
Protein Description	Human Cancer Antigen CA19-9 (Gastrointestinal Cancer) Antigen Grade. Known contaminants: 65 Units/ml (< 1%) Centocor CA125 RIA Assay.
Note	Caution: The human cell line supernatant tested negative for HIV 1&2 Ab, HIV Ag, HBsAg and HCV Ab. Because no test will guarantee a sample to be non-infective, all material derived from human fluids or tissues should be considered as potentially infectious.
Storage	Store the protein undiluted at 2-8°C for one month or (in aliquots) at -20°C for longer. Avoid repeated freezing and thawing.
Stability	Shelf life: one year from despatch.
Reference Data
Locus ID	109864281
Cytogenetics	21p11.2
Synonyms	RNA5-8N2
Summary	45S ribosomal DNA (rDNA) arrays, or clusters, are present on human chromosomes 13, 14, 15, 21 and 22, designated RNR1 through RNR5, respectively. Each cluster consists of multiple 45S rDNA repeat units that vary in number among individuals and chromosomes, with total diploid copy number estimates ranging from 60 to >800 repeat units in a human genome. The 45S rDNA repeat unit encodes a 45S rRNA precursor, transcribed by RNA polymerase I, which is processed to form the 18S, 5.8S and 28S rRNAs. This gene represents a copy of the 5.8S ribosomal RNA on chromosome 21. [provided by RefSeq, Mar 2017]

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