TABLE 2.

Percentages of muropeptides carrying the given peptide chain as a monomer or as an acceptor peptide chain in dimers, trimers, and tetramers^a

Muropeptide	MG1363	dacB mutant
Monomers	35.4	33.7
Tripeptide	12.8	0
Tetrapeptide	11.4	22.6
Pentapeptide	11.2	11.1
Dimers	44.6	44.3
Tripeptide	19.9	0
Tetrapeptide	13.6	32.2
Pentapeptide	11.1	12.1
Trimers	17.5	19.6
Tripeptide	7.7	0
Tetrapeptide	6.2	14.9
Pentapeptide	3.6	4.7
Tetramers	2.5	2.4
Tripeptide	1.1	0
Tetrapeptide	0.8	1.8
Pentapeptide	0.6	0.6
Cross-linking indexb	35.8	37.0

^aPercentages were calculated from the values shown in Table 1.

^bThe cross-linking index was calculated according to reference 9 with the formula (1/2 Σ dimers + 2/3 Σ trimers + 3/4 Σ tetramers)/Σ all muropeptides.