title: Peptide utilization by group N streptococci.
abstract: The rate of glycylleucine uptake by Group N streptococci varied widely. One strain of Streptococcus cremoris did not transport the dipeptide or utilize tripeptides. In peptide-utilizing strains, amino acid, dipeptide and tripeptide transport were distinct, although dipeptides inhibited tripeptide utilization. Specificity determinants for peptide transport and utilization were similar to those reported in Gram-negative bacteria. Peptide utilization in S. lactis was not completely dependent on the transport of intact peptides.
mesh_terms: D000596:Amino Acids / Q000378:metabolism; D001692:Biological Transport; D004151:Dipeptides / Q000378:metabolism; D013294:Lactococcus lactis / Q000378:metabolism; D010455:Peptides / Q000378:metabolism*; D013291:Streptococcus / Q000378:metabolism*
chemical_list: D000596:Amino Acids; D004151:Dipeptides; D010455:Peptides