Beta-casein (A2 Genotyping):
A brief overview
Beta-casein is a protein found in cow’s milk that has genetic variants classified into two groups, A1 and A2, based on the amino acid in position 67 of the protein. This A1/A2 classification can be useful for breeders developing herds with potential human health benefits.
For more information, please click this link

PLAG1:
A brief overview
Pleomorphic adenoma gene 1 (PLAG1) locus is linked to early-life body weight, peripubertal weight, and growth in Bos taurus. PLAG1 polymorphisms can be used to select animals with enhanced weight gain or to aid in the selection of animals with lower mature body weight and thus lower maintenance energy requirements.