sentence: Human and rodent acylated ghrelin were commercially available ( SC1357 , and SC1356 , respectively ; PolyPeptide Laboratories , Limhamn , Sweden ) , while human , In1-ghrelin , and mouse , In2-ghrelin , acylated peptides were synthesized in collaboration with Ipsen Bioscience ( Cambridge , MA , USA ) and developed by CPC Scientific ( Chinese Peptide Company , Hangzhou , China ; see below ) .