Biological process

down regulation of establishment of protein localisation to mitochondrion, down regulation of establishment of protein localization in mitochondrion, down regulation of establishment of protein localization to mitochondrion, down-regulation of establishment of protein localisation to mitochondrion, down-regulation of establishment of protein localization in mitochondrion, down-regulation of establishment of protein localization to mitochondrion, downregulation of establishment of protein localisation to mitochondrion, downregulation of establishment of protein localization in mitochondrion, downregulation of establishment of protein localization to mitochondrion, negative regulation of establishment of protein localisation to mitochondrion, negative regulation of establishment of protein localization in mitochondrion

Any process that stops, prevents or reduces the frequency, rate or extent of establishment of protein localization to mitochondrion.