TABLE 3.

Calculated percent coverage of the PG layer by the mycolate layer for M. leprae and M. tuberculosis cell wall at different PG conformations

^a Data are based on measurement for C-20 fatty acids by tunneling microscopy (34).

^b Data are calculated from mycolate dimensions and are reasonably consistent with studies on Langmuir monolayers (31), which yields 78 Ų for four chains.

^c Data are based on electron cryotomography in E. coli (35).

^d Data indicate the measured area in E. coli (37).

^e Data indicate the measured area in a different strain of E. coli (38).

^f 52 Å is the distance of a fully extended peptide chain and the associated glycan (39); glycan chains (which may not be perfectly parallel) were found to be 50–80 Å apart by electron cryotomography (35).

^g Data are calculated from the known 10 Å disaccharide length.