Abstract
Human milk was fractionated and analyzed for the distribution of copper, zinc, calcium, and magnesium among various fractions. In whole milk the concentration of copper was 0.27±0.13 μg/ml, zinc 1.10±1.19 μg/ml, calcium 241.2±61.9 μg/ml, and magnesium 41.4±15.2 μg/ml. Most of the Cu, Zn, Ca, and Mg was found in the skim milk, but significant amounts of Cu, Zn, and Ca were found in the fat, most likely associated with the fat globule membrane. Less than 4% of each of the elements was found in the casein. A low molecular weight fraction contained 26% of total Cu, 25% of Zn, 34% of Ca, and 54% of Mg. Gel filtration demonstrated Zn and Cu in skim milk binding to two different proteins with molecular weight (MW)>400,000 and 60 to 80,000, as well as to LMW compounds. The unique distribution and binding of these elements in the milk may, in part, explain the known high bioavailability of trace elements and minerals in human milk.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 504-508 |
| Number of pages | 5 |
| Journal | The Journal of Pediatrics |
| Volume | 101 |
| Issue number | 4 |
| DOIs | |
| State | Published - 1982 |
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ASJC Scopus subject areas
- Pediatrics, Perinatology, and Child Health
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Zinc, copper, calcium, and magnesium in human milk. / Fransson, Gun Britt; Lönnerdal, Bo.
In: The Journal of Pediatrics, Vol. 101, No. 4, 1982, p. 504-508.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Zinc, copper, calcium, and magnesium in human milk
AU - Fransson, Gun Britt
AU - Lönnerdal, Bo
PY - 1982
Y1 - 1982
N2 - Human milk was fractionated and analyzed for the distribution of copper, zinc, calcium, and magnesium among various fractions. In whole milk the concentration of copper was 0.27±0.13 μg/ml, zinc 1.10±1.19 μg/ml, calcium 241.2±61.9 μg/ml, and magnesium 41.4±15.2 μg/ml. Most of the Cu, Zn, Ca, and Mg was found in the skim milk, but significant amounts of Cu, Zn, and Ca were found in the fat, most likely associated with the fat globule membrane. Less than 4% of each of the elements was found in the casein. A low molecular weight fraction contained 26% of total Cu, 25% of Zn, 34% of Ca, and 54% of Mg. Gel filtration demonstrated Zn and Cu in skim milk binding to two different proteins with molecular weight (MW)>400,000 and 60 to 80,000, as well as to LMW compounds. The unique distribution and binding of these elements in the milk may, in part, explain the known high bioavailability of trace elements and minerals in human milk.
AB - Human milk was fractionated and analyzed for the distribution of copper, zinc, calcium, and magnesium among various fractions. In whole milk the concentration of copper was 0.27±0.13 μg/ml, zinc 1.10±1.19 μg/ml, calcium 241.2±61.9 μg/ml, and magnesium 41.4±15.2 μg/ml. Most of the Cu, Zn, Ca, and Mg was found in the skim milk, but significant amounts of Cu, Zn, and Ca were found in the fat, most likely associated with the fat globule membrane. Less than 4% of each of the elements was found in the casein. A low molecular weight fraction contained 26% of total Cu, 25% of Zn, 34% of Ca, and 54% of Mg. Gel filtration demonstrated Zn and Cu in skim milk binding to two different proteins with molecular weight (MW)>400,000 and 60 to 80,000, as well as to LMW compounds. The unique distribution and binding of these elements in the milk may, in part, explain the known high bioavailability of trace elements and minerals in human milk.
UR - http://www.scopus.com/inward/record.url?scp=0019994638&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0019994638&partnerID=8YFLogxK
U2 - 10.1016/S0022-3476(82)80690-2
DO - 10.1016/S0022-3476(82)80690-2
M3 - Article
C2 - 7119950
AN - SCOPUS:0019994638
VL - 101
SP - 504
EP - 508
JO - Journal of Pediatrics
JF - Journal of Pediatrics
SN - 0022-3476
IS - 4
ER -