Validation Log 2024-05-26 05:51:57.958960 mwtab Python Library Version: 1.2.5 Source: https://www.metabolomicsworkbench.org/rest/study/analysis_id/AN004273/mwtab/txt Study ID: ST002601 Analysis ID: AN004273 File format: txt Status: Contains Validation Errors Number Errors: 2 Error Log: SCHEMA: Section "COLLECTION" does not match the allowed schema. Missing key: 'COLLECTION_SUMMARY' SCHEMA: Section "ANALYSIS" does not match the allowed schema. Wrong key 'ANALYSIS_DETAILS:' in OrderedDict([('ANALYSIS_TYPE', 'MS'), ('ANALYSIS_DETAILS:', '9 isotopically labeled internal standards are used for the nucleotide quantitation (13C10, 15N5-AMP; 13C10, 15N5-GMP; 13C10, 15N2-UMP; 13C9, 15N3-CMP; 13C10-GTP; 13C10-UTP; 13C9-CTP; 13C10-ATP, and nicotinamide-1,N6-ethenoadenine dinucleotide (eNAD). Ion ratios of nucleotides to respective internal standards are computed from extracted ion chromatograms using a software package TargetLynx (Waters, Milford, MA). The ratios are converted to concentrations using calibrators prepared by spiking tissue homogenates with authentic nucleotides (Sigma, MO, USA). The values are expressed in pmol/mg.')])