Search Tips:

To search all records in the selected category, just press the [search] button without any input.

Keyword search finds records based on case-insensitive, substring matching algorithm. Combination of the following boolean operators are available, but only one "!" (it means "not") is allowed per query. Search options (including check boxes) function in the `AND' condition.

Numeric fields such as the number of carbon atoms, double bonds, or chemical groups are self-explanatory.

For fatty acids, use abbreviation such as C18:0 or C22:1. For hydroxy fatty acid and omega hydroxy fatty acid, use `h' and `omega', respectively. For long chain bases, use d18:1 (dihydroxy) and t18:0 (trihydroxy).

How to input the carbohydrate structure?

1. Sugar residues and substituents: use abbreviations (see below).
2. Anomeric designator: a (alpha), b (beta)
3. Sugar linkage: -3, -6 etc. (not 1-3 or 1-6 etc.)
4. Non-sugar substituents: abbreviation + position, e.g. S6 represents HSO3-6
5. Branched structures are described with parenthesis ( ).
   If multiple branches exist, describe all of them in the order of the number of linkage position (smaller to larger).
6. Anomer and linkage position may become unspecified by using "?".

   Gal?-4Glcb	anomer unspecified
   Galb-?Glcb	linkage position unspecified
   Gal?-?Glcb	both unspecified

7. There are two options for the search (using radio button).

   • "non-reducing end" option searches the beginning of the sugar chain.
   • "reducing end" option searches the end of the sugar chain.
   • If unchecked, all positions are searched.

   Note 1: Non-reducing end search will also find "core structure", i.e., the structure generated by detaching fucose and neuraminic acid from original sugar chain if any. For example, if you input the structure "Galb-3GalNAcb-4Gal" and check "non-reducing end" you will get Galb-3GalNAcb-4Gal-R and Fuca-2Galb-3GalNAcb-4Gal-R.

   Note 2: If you input a structure including -Cer, you will get the same result with "reducing end search".