Protein MmpS3 or LamA (Loss of asymmetry mutant A) of 299 aas with one very hydrophobic TMS at ~ residue 110. This protein is a component (subunit) of the complex involved in cell wall synthesis at the old pole. It is a mycobacterial divisome factor that when its gene is deleted, it collapses single-cell phenotypic heterogeneity (Rego et al. 2017). It coordinates lipid trafficking and is required for asymmetric polar growth in mycobacteria (Gupta et al. 2022).