{"id":"W1985564713","doi":"10.1016/j.jasms.2007.02.008","title":"Formation of (b<sub><i>n</i>−1</sub> + H<sub>2</sub>O) ions by collisional activation of maldi-formed peptide [M + H]<sup>+</sup> ions in a QqTOF mass spectrometer","year":2007,"lang":"en","type":"article","venue":"Journal of the American Society for Mass Spectrometry","topic":"Mass Spectrometry Techniques and Applications","field":"Chemistry","cited_by":21,"is_retracted":false,"has_abstract":true,"ca_institutions":"University of Manitoba","funders":"National Institute of General Medical Sciences; Natural Sciences and Engineering Research Council of Canada; National Institutes of Health","keywords":"Chemistry; Protonation; Mass spectrometry; Histidine; Peptide; Ion; Lysine; Residue (chemistry); Acetic acid; Amino acid; Stereochemistry; Mass spectrum; Crystallography; Chromatography; Organic chemistry; Biochemistry","routes":{"ca_aff":true,"ca_fund":true,"ca_venue":false,"about_ca":false,"invisible_to_affiliation_only":false},"retraction":null,"screen":null,"direct_labels":[],"prediction":{"model_version":"codex-gemma-dda1882f352a","candidate_categories":["metaepi_narrow"],"consensus_categories":[],"category_scores_codex":[0.00144989,0.0004700549,0.001085573,0.000607335,0.000249589,0.00004993089,0.0009667155,0.0002477746,0.000109181],"category_scores_gemma":[0.0003013011,0.000403925,0.001823771,0.003319617,0.0004899491,0.0005119037,0.0001364909,0.001043581,0.000002009612],"about_ca_system_candidate":false,"about_ca_system_consensus":false,"about_ca_system_score_codex":0.001328067,"about_ca_system_score_gemma":0.000262459,"about_ca_topic_candidate":false,"about_ca_topic_consensus":false,"about_ca_topic_score_codex":0.00002528021,"about_ca_topic_score_gemma":0.000007045557,"domain_scores_codex":[0.9955172,0.00006171378,0.001970738,0.0004045952,0.001220744,0.0008250172],"domain_scores_gemma":[0.9940361,0.0008607227,0.003652488,0.000723143,0.0004985906,0.0002289912],"domain_codex":null,"domain_gemma":null,"domain_candidate":null,"domain_consensus":null,"study_design_codex":"bench_or_experimental","study_design_gemma":"bench_or_experimental","study_design_scores_codex":[0.000291541,0.0005118444,0.001190496,0.0001843168,0.000279733,0.000001392015,0.0002505402,0.0001556695,0.9875228,0.001148835,0.007175844,0.001286927],"study_design_scores_gemma":[0.00130523,0.0004897349,0.001917385,0.0002258027,0.0001915651,0.00006199974,0.002602896,0.001082327,0.9842116,0.0067848,0.0007438727,0.0003827722],"study_design_candidate":"bench_or_experimental","study_design_consensus":"bench_or_experimental","genre_codex":"empirical","genre_gemma":"empirical","genre_scores_codex":[0.922853,0.00008602918,0.07386921,0.001300234,0.00004598654,0.0004853249,0.0003568345,0.00004794658,0.0009554534],"genre_scores_gemma":[0.9531704,0.0005443807,0.04556119,0.0002164052,0.0002587443,0.00005683095,0.00006466152,0.00007934708,0.00004806352],"genre_candidate":"empirical","genre_consensus":"empirical","teacher_disagreement_score":0.0303174,"threshold_uncertainty_score":0.9998413,"prediction_status":"machine_predicted_unvalidated"},"machine_scores":{"provisional":true,"baseline":true,"maturity_gate_passed":false,"score_opus":0.00910821414988747,"score_gpt":0.2496708694175412,"score_spread":0.2405626552676537,"validation_status":"score_only:v0-immature-baseline","note":"Baseline scores from an immature model (maturity gate not passed). Scores rank; they never assert a category."}}