[Rab1 protein]-L-serine + phosphocholine + H(+) => [Rab1 protein]-O-phosphocholine-L-serine + H2O
[rab1 protein]-l-serine + phosphocholine + h(+) => [rab1 protein]-o-phosphocholine-l-serine + h2o
[Rab1 protein]-L-serine + phosphocholine + H(+) => [Rab1 protein]-O-phosphocholine-L-serine + H2O
[rab1 protein]-l-serine + phosphocholine + h(+) => [rab1 protein]-o-phosphocholine-l-serine + h2o