cules ▁including ▁ ions , ▁car bo h yd r ates , ▁dru gs , ▁prote ins . ▁The ▁secret ed ▁mole cules ▁vary ▁in ▁size ▁from ▁the ▁small ▁E scher ich ia ▁col i ▁pe pt ide ▁col ic in ▁V , ▁which ▁is ▁ 1 0 ▁k Da , ▁to ▁the ▁Pseud omon as ▁flu ores c ens ▁cell ▁ad hes ion ▁protein ▁Lap A , ▁which ▁is ▁ 5 2 0 ▁k Da . ▁Among ▁the ▁most ▁well ▁known ▁mole cules ▁are ▁R TX ▁to x ins ▁and ▁lip ase ▁en zym es . ▁ ▁Type ▁II ▁▁ ▁Type ▁II ▁( T 2 SS ) ▁secret ion ▁system ▁depends ▁on ▁the ▁Sec ▁or ▁Tat ▁system ▁for ▁initial ▁secret ion ▁inside ▁the ▁b acter ial ▁cell . ▁From ▁the ▁peri pl asm , ▁prote ins ▁are ▁secret ed ▁out ▁of ▁the ▁outer ▁memb rane ▁secret ins . ▁Secret ins ▁are ▁mult imer ic ▁( 1 2 – 1 4 ▁sub un its ) ▁complex ▁of ▁p ore - form ing ▁ ▁prote ins . ▁Secret in ▁is ▁supported ▁by ▁ 1 0 – 1 5 ▁other ▁inner ▁and ▁outer ▁memb rane ▁prote ins ▁to ▁const itute ▁the ▁complete ▁secret ion ▁appar atus . ▁ ▁Type ▁III ▁▁ ▁Type ▁III ▁secret ion ▁system ▁( T 3 SS ▁or ▁T T SS ) ▁is ▁struct ur ally ▁similar ▁and ▁related ▁to ▁the ▁bas al ▁body ▁of ▁b acter ial ▁flag ella . ▁Se en ▁in ▁some ▁of ▁the ▁most ▁vir ul ent ▁Gram