(4R)-hydroxysphinganine + phosphate => (4R)-hydroxysphinganine 1-phosphate + H2O
(4r)-hydroxysphinganine + phosphate => (4r)-hydroxysphinganine 1-phosphate + h2o
(4R)-hydroxysphinganine + phosphate => (4R)-hydroxysphinganine 1-phosphate + H2O
(4r)-hydroxysphinganine + phosphate => (4r)-hydroxysphinganine 1-phosphate + h2o