MassBank:KOX00002p

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All Molecules KOX PR PBX COX

Ion Frequency

Prec.-Product

Neutral Loss

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GABA

IDs and Links
MassBank	GABA
CAS	56-12-2
Keio ID	A002+

Top 10 Similar Molecules of GABA

Ranking	About scoring
KOX00662p Score:19.04 KOX00276p Score:19.04 KOX00039p Score:10.76 KOX00795p Score:8.27 KOX00740p Score:8.27 KOX00739p Score:8.27 KOX00547p Score:8.27 KOX00292p Score:8.27 KOX00102p Score:8.27 KOX00700p Score:5.38	The similarity score between two molecules is defined as the sum of Shannon entropy of ionic formulas shared by the molecules: $\textstyle - \sum_{p\in shared} \log(\mbox{frequency}(p))$ 代謝物間の類似度スコアは、それらのスペクトルで共有される（アノテートされた）イオン式のシャノン情報量の総和です。

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Precursor	Product	Comments
C4H10NO2 (104)	C4H7O2 (87)	a
C4H10NO2 (104)	C4H8NO (86)	b

Precursor-Product Relationship

About the PP Table (行列表示について)
The matrix is viewed columnwise. The topmost precursor ion in bold face produces the product ions beneath it. Each formula in matrix cells corresponds to the neutral loss. Blackout cells indicate products that cannot be derived, and orange cells indicate a structurally plausible link produced by cleaving a single chemical bond (in cases of ring-opening, two bonds).	行列は列方向に見ます。最上段太字の前駆イオン(precursor ion)が直下の生成イオン群(product ions)になると解釈します。 行列要素に書かれている組成式はニュートラルロスです。黒は前駆イオンから生成しえない関係、オレンジは分子構造における共有結合1本の切断（開環の場合は2本）で生じる関係を意味します。

KOX00002p	104 C4H10NO2	87 C4H7O2	86 C4H8NO	69 C4H5O
104 C4H10NO2
87 C4H7O2	H3N
86 C4H8NO	H2O
69 C4H5O	H5NO	H2O	H3N

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