A. Luminal and gastric hydrolysis.

 

B. Apical membrane bound peptidases hydrolysis.

 

C. PepT1 peptide transporter.

 

D. H+ independent transport activity of intact peptides to blood stream.

 

E. intracelular peptidases.

 

F. Na+ dependent and independent free aminoacids trans- porters.

 

G. Na+ independent and amino acid exchanger transport proteins.

 

H. Na+/H+ apical exchanger and and Basolateral Na+/K+ ATPase restabish the extracellular-intracelullar Na+ and H+ gradients altered during the absorbtion process.

 

I. Some types of proteins has specific transports. Adapted from Ganapathy et al. (1994) Di-Tripeptides LUMEN