(4R)-hydroxyeicosasphinganine + a fatty acyl-CoA = N-acyl-4-hydroxyeicosasphinganine + CoA + H(+)
(4r)-hydroxyeicosasphinganine + a fatty acyl-coa = n-acyl-4-hydroxyeicosasphinganine + coa + h(+)
(4R)-hydroxyeicosasphinganine + a fatty acyl-CoA = N-acyl-4-hydroxyeicosasphinganine + CoA + H(+)
(4r)-hydroxyeicosasphinganine + a fatty acyl-coa = n-acyl-4-hydroxyeicosasphinganine + coa + h(+)