4-hydroxybutanoate + ATP + CoA <=> 4-hydroxybutanoyl-CoA + ADP + phosphate
4-hydroxybutanoate + atp + coa <=> 4-hydroxybutanoyl-coa + adp + phosphate
4-hydroxybutanoate + ATP + CoA <=> 4-hydroxybutanoyl-CoA + ADP + phosphate
4-hydroxybutanoate + atp + coa <=> 4-hydroxybutanoyl-coa + adp + phosphate