Search types

Press Title search Types Play Sam Wish to reserve ... 

See also Derwent Information Ltd. Patent information searches, types of, 78 231—239. See also Infringement patent information searches Patent searches... 

Type 2 MTs, also currently understood to function exclusively as OMTs, are found in all lignin-producing plants. This family is specific for coenzyme A derivatized phenylpropanoid compounds and appears to be less diverse in sequence and gene number than the type 1 family of MTs (Fig. 2.3). Based on database searches, type 2 OMTs consist of caffeoyl and feruloyl coenzyme-A specific OMTs (CCoAOMTs). The most closely related enzymes to plant CCoAOMTs are the mammalian small molecule methyltransferases, including catechol OMT and bacterial MTs involved in macrolide biosynthesis. 

To support the workflow just described, a number of structure and reaction search types have come into use (Fig. 9.11). These are briefly described as follows. 

Figure 9.11. Search types depend on the nature of the chemical information.

Isomer and Tautomer Search. A search types where bond order, hydrogen counts, certain atom valences, and bond or atom stereochemistry may be allowed to vary from those specified in the query. Such searching allows re-... 

The National Institutes of Health maintains a databank called Genbank, Its address on the internet is http / /www.ncbi.njm.nih gov. Once the homepage has been displayed on the screen, one can highlight Nucleotide Sequence Search, type the name of the protein coded by the nucleotides, and access the nucleotide sequence. Alternatively, one can highlight Protein Sequence Search, type the name of the protein, and acquire the amino acid sequence. If one knows the partial DNA sequence, i e, about 50 consecutive nucleotides, one can enter the sequence and, in this way, acquire a display of any gene that contains the entered sequence. If one knows the partial amino acid sequence, i.e., about 15 consecutive amino adds, one can also enter this sequence and get a display of any polypeptide containing the entered sequence. 

On ScienceDirect (and assuming you are subscribed to this Reference Work) you may use either the Basic Search Form or Advanced Search. For the purposes of simplicity in these notes only the Basic Search is described. (Quick Search is also supported but offers less granular options than the other search types.)... 

Search type Selection probability Neighborhood operation... 

Select Substructure search under Search type... 

Japanese patent offices. There is a patent number search page, as well as Boolean and advanced search pages for text field searching. Both cited and citing patents are hyperlinked to each patent. There are hyperlinks between the classification numbers and their definitions and good help pages for each search type. 

The PubChem structure search tool enables one to query and subset PubChem Compound by a variety of chemical structure search types and optional filters. The chemical structure search service may be directly accessed using the URL ... 

While the input query and search type are all that are necessary to perform a sfmcfure search in PubChem, there are numerous choices by which one may narrow the search to smaller subsets of PubChem. For example, one may search only within a previous Entrez search result, or even a previous stmcture search result, or upload a file of ClDs againsf which fhe search is fo be performed. One may filter based on a wide variety of properties, such as molecular weight, heavy atom count, presence or absence of stereochemistry, assay activity, elemental composition, depositor name or category, etc. Most of these subset operations could be accomplished through appropriate Entrez index queries followed by Boolean operations on structure search results however, the structure search tool provides a convenient one-step interface for chemical search refinement. 

Of the graphical search types listed, one of the most important is Reaction Substructure Search, or RSS. The reaction indexing group at Molecular Design initiated a new project to increase the flexibility and specificity of RSS searching. That project is the subject of this paper. 

The NIST Chemistry WebBook supports a variety of searches for chemical species. Each search type has its own associated Web page. Search types currently available are genoal, physical property, formula, chemical name, CAS registry number, ion energetics, ionization energy, electron affinity, proton affinity, acidity, vibrational and electronic energy... 

Substructure search type of —y structure search. Complete substance classes can be searched for by using a substructure without naming each similar substance specifically. 

Search type 4 in Figure 6 is ordinarily requested in order to review the performance of a particular set of compounds in certain test systems. It also provides a list of those compounds which were not tested in the defined set. This list can then be sent to Chemdata with a request for samples to be submitted for the test(s) in question, if the asking scientist desires. 

OPTION SUBSSS 4 DOING SUB STRUCTURE SEARCH TYPE E TO EXIT... 

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