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1.

Comparison the MHC isoforms and the type of VF found in various mammals at different ages.

Age Heart size VF* MHC†
Rat New born Very small SVF V3
Young Small TVF V1
Adult ≤ 2 years Small TVF V1 > V3
Guinea Pig New born Very small SVF V3
Young < 4 months Small TVF V1 > V3
Adult Small SVF V3 > V1
Rabbit Young < 4 months Small TVF V1 > V3
Adult Small SVF V3 > V1
Cat Young < 2 years Medium TVF V1 > V3
Adult Medium SVF V3 > V1
Dog Puppy 1–5 weeks Medium TVF V1 > V3
Young > 6 weeks Medium SVF V3 > V1
Adult Large SVF V3
Pig Piglet > 4 < 12 days Medium SVF V3 > V1
Young > 12 days Large SVF V3
Adult Large SVF V3
*

Type of VF, sustained (SVF) or transient (TVF) as examined in our laboratories.

MHC data according to Lompre et al. [20].