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2161 58992 Ensembl ENSG00000131187 ENSMUSG00000021492 UniProt P00748 Q80YC5 RefSeq (mRNA) NM_000505 NM_021489 RefSeq (protein) NP_000496 NP_067464 Location (UCSC) Chr 5: 177.4 – 177.42 Mb Chr 13: 55.57 – 55.57 Mb PubMed search Wikidata View/Edit Human View/Edit Mouse Coagulation factor XII, also known as Hageman factor, is a plasma protein involved in coagulation. It is the zymogen form of ...
Over time, methods for testing the sensitivity of bacteria to antibiotics have developed and changed. [25] Alexander Fleming in the 1920s developed the first method of susceptibility testing. The "gutter method" that he developed was a diffusion method, involving an antibiotic that was diffused through a gutter made of agar. [25]
This test is used to measure the contact activation pathway (intrinsic pathway) and the common pathway of clotting. [7] FXII is a zymogen, which means that it requires processing to attain its catalytic protease activity. Upon binding to surfaces, FXII alters in its conformation, giving it low-level protease activity.
Etest is a quantitative technique for determining the MIC of microoganisms. It is used for a range of Gram-negative and Gram-positive bacteria such as Pseudomonas, [2] [3] Staphylococcus, [4] and Enterococcus species, [5] as well as fastidious bacteria, such as Neisseria and Streptococcus pneumoniae. [1]
A bioassay is an analytical method to determine the potency or effect of a substance by its effect on living animals or plants (in vivo), or on living cells or tissues (in vitro). [1] [2] A bioassay can be either quantal or quantitative, direct or indirect. [3] If the measured response is binary, the assay is quantal; if not, it is quantitative ...
Agar dilution is one of two methods (along with broth dilution) used by researchers to determine the minimum inhibitory concentration (MIC) of antibiotics. It is the dilution method most frequently used to test the effectiveness of new antibiotics when a few antibiotics are tested against a large panel of different bacteria.
A general procedure for HA is as follows, a serial dilution of virus is prepared across the rows in a U or V- bottom shaped 96-well microtiter plate. [5] The most concentrated sample in the first well is often diluted to be 1/5x of the stock, and subsequent wells are typically two-fold dilutions (1/10, 1/20, 1/40, etc.).
Factor XII deficiency is a deficiency in the production of factor XII (FXII), a plasma glycoprotein and clotting factor that participates in the coagulation cascade and activates factor XI. FXII appears to be not essential for blood clotting, as individuals with this condition are usually asymptomatic and form blood clots in vivo .