It is not, however, extractable from skin, though the receptor protein to which it attaches in order to perform its action is present in many skin cells, and a closely similar molecule has been isolated from human urine.
In Association for Molecular Pathology v. Myriad Genetics, the court ruled that "a naturally occurring segment" of DNA — genetic material that has been isolated from human chromosomes — cannot be patented because it is simply a product of nature.
Other stem cells have been isolated from human exfoliated deciduous teeth (SHED) (Miura et al. 2003).
Multipotent precursors able to generate neurons, astrocytes, and oligodendrocytes have previously been isolated from human brain embryos and recently from neurogenic regions of the adult human brains.
The main contributors that have been isolated from human tumors with procoagulant activity are classified into two major categories: tissue factor (also called thromboplastin) and cancer procoagulant [2, 4].
Although not considered a typical oral pathogen, C. beijerinckii has been isolated from human carious dentin in previous studies [18].
Nipah virus has been isolated from human saliva, urine, nasal and pharyngeal secretions [5], [6], [7], [8].
B. lusitaniae has been shown to be pathogenic in laboratory mice [10] and has also been isolated from human patients [11].
NSCLC initiating cells have been isolated from human lung cancer cell lines based on increased Hoechst 33342 dye efflux activity [12].
In addition, neural stem cells and neural progenitors have been isolated from human brain using genetic promoter-reporters of neural stem cell markers [24], [25].
More recently, the 38 kDa apolipoprotein HPBP has been isolated from human blood and its structure was solved using X-ray crystallography [16], [35].
