Any process that stops, prevents, or reduces the frequency, rate or extent of ribosomal large subunit export from nucleus.
Synonyms:
exact_synonym:
negative regulation of ribosomal large subunit export from cell nucleus; negative regulation of ribosomal large subunit export out of nucleus; negative regulation of ribosomal large subunit transport from nucleus to cytoplasm; negative regulation of ribosomal large subunit-nucleus export
related_synonym:
negative regulation of 50S ribosomal subunit export from nucleus; negative regulation of 60S ribosomal subunit export from nucleus