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This , in turn , signals the gingival epithelium to produce chemical mediators including interleukin – 1 beta ( IL-1 ) , prostaglandins , tumor necrosis factor alpha ( TNF - α ) , and matrix metalloproteinases.4 These products recruit neutrophils to the area and influence chemotaxis , and can cause increased permeability of gingival vessels that permits plasma proteins to emigrate from the blood vessels into the tissue . We also note that matrix multiplication is by definition a series of parallel dot-product operations and hence just a series of FMAs , which can be done independently . From these data I created a global labrid morphospace with a PCA conducted on the correlation matrix of species values . All forms of vascular reconstruction such as angioplasty and vein bypass procedures effect a response to injury that ultimately leads to smooth muscle cell ( SMC ) proliferation and subsequently , deposition of profuse amounts of extracellular matrix .. The response matrix was generated ( a ) from a set of ground calibrations with monochromatic lines from radioactive sources and ( b ) from a forced-adjustment fit to the canonical Crab spectrum ( PLI = 2.15 , Norm = 10.17 ) .