Any process that stops, prevents or reduces the frequency, rate or extent of tetrapyrrole biosynthetic process.
Synonyms:
exact_synonym:
down regulation of tetrapyrrole anabolism; down regulation of tetrapyrrole biosynthesis; down regulation of tetrapyrrole biosynthetic process; down regulation of tetrapyrrole formation; down regulation of tetrapyrrole synthesis; downregulation of tetrapyrrole anabolism; downregulation of tetrapyrrole biosynthesis; downregulation of tetrapyrrole biosynthetic process; downregulation of tetrapyrrole formation; downregulation of tetrapyrrole synthesis; inhibition of tetrapyrrole anabolism; inhibition of tetrapyrrole biosynthesis; inhibition of tetrapyrrole formation; inhibition of tetrapyrrole synthesis; negative regulation of tetrapyrrole anabolism; negative regulation of tetrapyrrole biosynthesis; negative regulation of tetrapyrrole formation; negative regulation of tetrapyrrole synthesis