TABLE 4.

Abundance of major metabolic groups in serial dilutions of midgut and hindgut homogenates of P. ephippiata larvae (third instar)^a

Metabolic group	Substrate	Midgut	Hindgut
Aerobicb	Cellulosec	8	7
	Glucose	9-10	10
	Casamino Acidsd	9	10
	Vanillin, cinnamate	6-7	8
Fermentinge	Cellulosec	<4f	<4
	Glucose	9	10
	Casamino Acidsd	8	9
	Lactate	7-8	8-9
Methanogenice	H2-CO2	6-8	8-10
Homoacetogenice	H2-CO2	4-5	7-8
Sulfate reducinge	Lactate, formate	4	6

^aValues represent log₁₀ of the last positive dilution in three to four replicate series at pH 7.

^bMedium MM-5 incubated under air.

^cFilter paper disks (equivalent to 5 mM glucose).

^dConcentration was increased to 0.5 mg liter⁻¹.

^eMedium AM-5 under H₂-CO₂ atmosphere.

^fDilution series started with the 10⁴ dilution.