AOAC SPIFAN Stakeholder Program Meeting Book (March 17, 2021)
Beta-casein Under Gut Digestion
58
54
55
Val
Tyr
Pro Phe Val
Glu Pro Ile Pro
Asn
Ser
Leu Pro
Human beta-casein
Val
Tyr
Pro Phe Pro Gly Pro Ile Pro
Ser
Leu Pro
Asn
Bovine beta-casein A2
Val
Tyr
Pro Phe Pro Gly Pro Ile
His
Asn Ser Leu Pro
Bovine beta-casein A1
67
Pro
Pro Asn
Tyr Pro Phe
Ile
Pro Gly
A2 release BCM-9
Amino Acid position 67
digestion
A2 beta casein protein chain (209AA) A1 beta casein protein chain (209AA)
Val
Tyr
Pro Phe Pro Gly Pro Ile Pro
Ser
Leu Pro
Asn
Val
Tyr
Pro Phe Pro Gly Pro Ile
His
Asn Ser Leu Pro
Amino Acid position 67
digestion
Zinnia Zhang, Kevin Mahan, Abbott internal poster adapted from Gobbetti M. et al. 2002 CritRev Food SciNutr.;42(3):223-39. Jinsmaa, Y & Yoshikawa, M. 1999. Peptides V20(8), pp 957-962.
A1 releases BCM-7 Reported as strong exorphin
Tyr
Gly Pro Ile
Pro Phe Pro
Beta-Casein Genotypes
X Eg. Frequency of cow breeds
HOLSTEIN A2A2 A1A2 A1A1
JERSEY A2A2 A1A2 A1A1
3%
16%
35%
32%
65%
49%
6
Lynsay Beavers L., Van Doormaal B. Canadian Dairy Network
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