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Description
Human & Monkey free PSA OneStep ELISA KitProduct Specification Antigen free PSA Immunogen Recombinant Protein Antibody Type Recombinant mAb Reactivity Hu, Mk Purification Protein A Stability & Storage 12 months from date of receipt reconstitution, 2 to 8'C as supplied. Kit Precision Intra assay: 2. 9% Inter assay: 3. 1% Sample type Cell culture supernatant; Serum; Plasma Assay type Sandwich (quantitative) Sensitivity 8. 852 pg mL Range 31. 25 pg mL 2000 pg mL Recovery Cell culture
Product Specification
| Antigen | free PSA |
| Immunogen | Recombinant Protein |
| Antibody Type | Recombinant mAb |
| Reactivity | Hu, Mk |
| Purification | Protein A |
| Stability & Storage | 12 months from date of receipt / reconstitution, 2 to 8'C as supplied. |
Kit
| Precision | Intra-assay: 2.9%； Inter-assay: 3.1% |
| Sample type | Cell culture supernatant; Serum; Plasma |
| Assay type | Sandwich (quantitative) |
| Sensitivity | 8.852 pg/mL |
| Range | 31.25 pg/mL – 2000 pg/mL |
| Recovery | Cell culture supernatant: 108% Serum: 99% Plasma: 103% |
| Assay time | 60 minutes |
| Species reactivity | Hu; Mk |
Background
Human free PSA refers to the portion of prostate-specific antigen that circulates in the bloodstream unbound to other proteins. It is one of several molecular forms of PSA that can be measured through a blood test. The term "free" distinguishes it from "complexed PSA," which is bound to proteins like alpha-1-antichymotrypsin. Clinically, the measurement of free PSA is not used alone but in relation to the total PSA level. This calculation yields the free PSA percentage, which is a valuable diagnostic ratio. A lower free PSA percentage is generally associated with a higher probability of prostate cancer. Conversely, a higher percentage is more often linked to benign conditions, such as an enlarged prostate. Therefore, this test is primarily used to help doctors decide on the need for a prostate biopsy in men with a moderately elevated total PSA.
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