Flow cytometric analyses with monoclonal antibodies were so far mainly restricted to cell surface molecules. Intracellular structures such as cytoplasmic or nuclear enzymes, oncoproteins, cytokines, immunoglobulins etc. were largely excluded from such studies. Also excluded from flow cytometric studies were cytoplasmic localizations of well-established membrane molecules like CD3 and CD22, which, in their cytoplasmic form, are the most reliable lineage markers in undifferentiated leukemia. With the FIX&PERM® Kit flow cytometric analysis of intracellular antigens has become as easy as surface antigen studies. The only prerequisite is the availability of suitable antibody conjugates. Most of the available monoclonal antibody conjugates can be used with the FIX&PERM® Kit, some determinants are sensitive, however, to the fixation step involved. This and the optimal fixation time have to be tested for each reagent.
Welcome, Peter Rutten
We are pleased to announce that Peter Rutten has now started in his role as Operations Director here at Exalpha Biologicals Inc. Peter has a Master’s of Science degree in Industrial and Organizational Psychology and this has lead him down a very business orientated career path. Peter is looking forward to working with the team at Exalpha. Peters primary focus is the customer experience and he will be working with the Laboratory team, the Quality Control team and the Order Processing team to ensure this focus is achieved. We all wish Peter well in his new role.
Tissue Inhibitor of Matrix Metalloproteinase 2 (TIMP2)
CSC-21K; Metalloproteinase Inhibitor 2 precursor
Human, Mouse, Rabbit, Chicken, Zebrafish, Pig
ELISA, Western Blot, Immunohistochemistry
Protein A/G Chromatography
TIMP-1, TIMP-2, TIMP-3 and TIMP-4 (for tissue inhibitor of metalloproteinases-1, -2, -3 and -4) complex with metalloproteinases such as collagenases,gelatinases and stromelysins, resulting in irreversible inactivation of the metalloproteinase. TIMP-1 was found to be identical to EPA (erythroidpotentiation activity). Parathyroid hormone has been shown to be a regulator of TIMP-2 in osteoblastic cells. TIMP-3 may be involved in regulating trophoblastic invasion of the uterus as well as in regulating remodeling of the extracellular matrix during the folding of epithelia, and in the formation,branching and expansion of epithelial tubes. TIMP-4 is most highly expressed in heart and low levels of TIMP-4 are expressed in liver, brain, lung, thymus and spleen.
Hybridoma produced by the fusion of splenocytes from BALB/c mice immunized with a synthetic peptide derived from the human TIMP-2 protein and mouse myeloma Ag8563 cells. Sequence common in mouse, rabbit, chicken, zebrafish and pig.
Colon and gastric tissues. Stronger expression observed in tumor versus normal protein.
Provided as solution in phosphate buffered saline with 0.08% sodium azide
Product should be stored at -20°C. Aliquot to avoid freeze/thaw cycles
Left: Immunohistochemical staining of human colon carcinoma tissue using TIMP-2 antibody (Cat. No. X2061M).
Right: Western blot using TIMP-2 antibody on recombinant human TIMP-2 proenzyme (400 ng/lane).
1. Hoikkala, S., et al. (2006). Tissue MMP-2 and MMP-9 [corrected] are better prognostic factors than serum MMP-2/TIMP-2--complex or TIMP-1 [corrected] in stage [corrected] I-III lung carcinoma. Cancer Lett. 236(1):125-132
2. Ring, P., et al. (1997). Expression of tissue inhibitor of metalloproteinases TIMP-2 in human colorectal cancer--a predictor of tumour stage. Br. J. Cancer. 76(6):805-811.