M/Z: 774.422

Hit 2 annotations: Arg-Pro-Pro-Gly-Phe-Ser-Pro_[M+NH4]+; Angiotensin IV_[M-H2O+NH4]+

在BioDeep NovoCell知识数据库中，参考离子总共被划分为4个级别。

Confirmed: 这个参考离子已经通过手动审计得到确认和验证。
Reliable: 这个参考离子可能在特定的解剖组织环境中高度保守。
Unreliable: 这个参考离子具有较高的排名价值，但缺乏可重复性。
Unavailable: 由于排名价值低且缺乏可重复性，这个参考离子不应用于注释。

Found 1 Reference Ions Near m/z 774.422

NovoCell ID	m/z	Mass Window	Metabolite	Ranking	Anatomy Context
MSI_000004256 Unreliable	774.4186	774.4186 ~ 774.4186 MzDiff: `none`	Arg-Pro-Pro-Gly-Phe-Ser-Pro (BioDeep_00000176193) Formula: C35H52N10O9 (756.3919)	0.83 (100%)	Homo sapiens [UBERON:0002107] liver

Found 2 Sample Hits

Metabolite	Species	Sample
Arg-Pro-Pro-Gly-Phe-Ser-Pro Formula: C35H52N10O9 (756.3919) Adducts: [M+NH4]+ (Ppm: 9.1)	Homo sapiens (Liver)	20171107_FIT4_DHBpos_p70_s50 Resolution: 50μm, 70x70 Description
Angiotensin IV Formula: C40H54N8O8 (774.4064) Adducts: [M-H2O+NH4]+ (Ppm: 9.9)	Mus musculus (Lung)	image5 Resolution: 40μm, 163x183 Description Supplementary Figure S8. MALDI-MSI data of mouse lung tissue administered with D9-choline and U 13C-DPPC–containing Poractant alfa surfactant (labels administered 18 h prior to sacrifice). Ion images of (a) m/z 796.6856 ([U13C-DPPC+Na]+), (b) m/z 756.5154 [PC32:0+Na]+ and (c) m/z 765.6079 ([D9-PC32:0+Na]+). (d) Overlay image of [U13C-DPPC+Na]+ (red) and [D9-PC32:0+Na]+ (green). Parts per million (ppm) mass errors are indicated in parentheses. All images were visualised using totalion-current normalisation and using hotspot removal (high quantile = 99%). DPPC = PC16:0/16:0.

Metabolite

Species

Sample

Arg-Pro-Pro-Gly-Phe-Ser-Pro

Formula: C35H52N10O9 (756.3919)
Adducts: [M+NH4]+ (Ppm: 9.1)

Homo sapiens (Liver)

20171107_FIT4_DHBpos_p70_s50

Resolution: 50μm, 70x70

Description

Angiotensin IV

Formula: C40H54N8O8 (774.4064)
Adducts: [M-H2O+NH4]+ (Ppm: 9.9)

Mus musculus (Lung)

image5

Resolution: 40μm, 163x183

Description

Supplementary Figure S8. MALDI-MSI data of mouse lung tissue administered with D9-choline and U 13C-DPPC–containing Poractant alfa surfactant (labels administered 18 h prior to sacrifice). Ion images of (a) m/z 796.6856 ([U13C-DPPC+Na]+), (b) m/z 756.5154 [PC32:0+Na]+ and (c) m/z 765.6079 ([D9-PC32:0+Na]+). (d) Overlay image of [U13C-DPPC+Na]+ (red) and [D9-PC32:0+Na]+ (green). Parts per million (ppm) mass errors are indicated in parentheses. All images were visualised using totalion-current normalisation and using hotspot removal (high quantile = 99%). DPPC = PC16:0/16:0.