Phenotype Allele Zygosity Sex Life Stage Procedure Parameter Phenotyping Center Source P Value Data decreased heart weight Mast1 homozygote male Early adult Heart Weight Heart weight MARC IMPC 9.39E-5 //www.mousephenotype.org/data/charts?accession=MGI:1861901&allele_accession_id=NOT-RELEASED-74af5200c5&zygosity=homozygote¶meter_stable_id=IMPC_HWT_008_001&pipeline_stable_id=IMPC_001&procedure_stable_id=IMPC_HWT_001¶meter_stable_id=IMPC_HWT_008_001&phenotyping_center=MARC