Assertion: nucleic acid | /r/AtLocation | tissue
Facets:
Source sentences:
text: The viruses, especially the plant viruses, are also extremely good sources of relatively “native” nucleic acid because one of the major difficulties in preparing such material is the fact that the nucleic acids are found in tissues, in which large amounts of the various phosphatases are present and consequently, it is difficult to ensure that enzymic degradation does not take place.