Successful collaboration with the group of Dr. Pierre Morsomm was crowned by the short-term research fellowship of Belgian student Anne-Sophie Colinet at our department. The aim of joint project is the uncovering of the transport mechanism of Gdp1p in Golgi apparatus of S. cerevisiae. Gdp1 is the Ca2+ transporter homologous to the product of human gene TMEM165. Mutations in this gene are associated with the autosomal recessive disorder Congenital Disorder of Glycosylation, type IIk (CDG II). The main task of Anne-Sophie Colinet was the measurement of the intracellular pH in S. cerevisiae lacking gene encoding the Gdt1 transporter.