Hydroxyprolines are available in different isomeric forms. BIOSYNTAN offers peptides with 4-Hyp and 3-Hyp. Both building blocks can be implemented as cis- or trans-isomer.

BIOSYNTAN offers peptides with 4-Fluoro-proline in cis- or trans-configuration.

BIOSYNTAN offers peptides with 4-amino-proline in cis-configuration.