Paper · 1962 · Journal of Food Science

Pectin Methylesterase in Snap Beansa, b

J. P. VAN BUREN; J. C. MOYER; W. B. ROBINSON

7
claims
14
verbatim quotes
47
citations
1
research areas
—
Not open access

Abstract

SUMMARY Snap bean pectin methylesterase had a pH optimum of 8.2. Its activity was enhanced by the presence of salts such as sodium chloride and calcium chloride. Low pH conditions increased the susceptibility of the enzyme to heat inactivation. There were indications that conditions were present in the intact pod which protected the enzyme from heat denaturation. The enzyme had a Q 10 of 1.4 over a wide temperature range. It was not regenerated on frozen storage.

Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗

The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.

Claims 7

Observationobservedoriginal resultmeasured

Claim · model-written summary

Snap bean pectin methylesterase had a pH optimum of 8.2.

Taxon
Snap beane0
Gene
pectin methylesterasee0
Outcome
pH optimume0
Value
8.2e0

Verbatim

e0

“Snap bean pectin methylesterase had a pH optimum of 8.2”

✓ located verbatim in the source · abstract, characters 8–63 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Sodium chloride enhanced snap bean pectin methylesterase activity.

Taxon
Snap beane1
Treatment
sodium chloridee0
Gene
pectin methylesterasee1
Outcome
activitye0
Direction
enhancede0

Not reportedComparator

Verbatim

e0

“Its activity was enhanced by the presence of salts such as sodium chloride and calcium chloride”

✓ located verbatim in the source · abstract, characters 65–160 · show in text ↑
t0

“Snap Beans”

✓ located verbatim in the source · title, characters 25–35 · show in text ↑
e1

“Snap bean pectin methylesterase had a pH optimum of 8.2”

✓ located verbatim in the source · abstract, characters 8–63 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Calcium chloride enhanced snap bean pectin methylesterase activity.

Taxon
Snap beane1
Treatment
calcium chloridee0
Gene
pectin methylesterasee1
Outcome
activitye0
Direction
enhancede0

Not reportedComparator

Verbatim

e0

“Its activity was enhanced by the presence of salts such as sodium chloride and calcium chloride”

✓ located verbatim in the source · abstract, characters 65–160 · show in text ↑
e1

“Snap bean pectin methylesterase had a pH optimum of 8.2”

✓ located verbatim in the source · abstract, characters 8–63 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Low pH increased susceptibility of snap bean pectin methylesterase to heat inactivation.

Taxon
Snap beane1
Treatment
Low pH conditionse0
Gene
pectin methylesterasee1
Outcome
susceptibility of the enzyme to heat inactivatione0
Direction
increasede0

Not reportedComparator

Verbatim

e0

“Low pH conditions increased the susceptibility of the enzyme to heat inactivation”

✓ located verbatim in the source · abstract, characters 162–243 · show in text ↑
e1

“Snap bean pectin methylesterase had a pH optimum of 8.2”

✓ located verbatim in the source · abstract, characters 8–63 · show in text ↑
Mechanismauthor interpretationoriginal resultpositivemeasured

Claim · model-written summary

Conditions in intact snap bean pods appeared to protect the enzyme from heat denaturation.

Taxon
Snap beane1
Organ / stage
intact pode0
Gene
pectin methylesterasee1
Outcome
protected the enzyme from heat denaturatione0
Qualifier
conditions were present in the intact pode0

Verbatim

e0

“There were indications that conditions were present in the intact pod which protected the enzyme from heat denaturation”

✓ located verbatim in the source · abstract, characters 245–364 · show in text ↑
e1

“Snap bean pectin methylesterase had a pH optimum of 8.2”

✓ located verbatim in the source · abstract, characters 8–63 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

Snap bean pectin methylesterase had a Q 10 of 1.4 across a wide temperature range.

Taxon
Snap beane1
Gene
pectin methylesterasee1
Outcome
Q 10e0
Value
1.4e0
Qualifier
wide temperature rangee0

Verbatim

e0

“The enzyme had a Q 10 of 1.4 over a wide temperature range”

✓ located verbatim in the source · abstract, characters 366–424 · show in text ↑
e1

“Snap bean pectin methylesterase had a pH optimum of 8.2”

✓ located verbatim in the source · abstract, characters 8–63 · show in text ↑
Observationobservedoriginal resultnegativemeasured

Claim · model-written summary

Snap bean pectin methylesterase was not regenerated on frozen storage.

Taxon
Snap beane1
Gene
pectin methylesterasee1
Outcome
not regenerated on frozen storagee0

Verbatim

e0

“It was not regenerated on frozen storage”

✓ located verbatim in the source · abstract, characters 426–466 · show in text ↑
e1

“Snap bean pectin methylesterase had a pH optimum of 8.2”

✓ located verbatim in the source · abstract, characters 8–63 · show in text ↑

ph · physiology: enzyme activity · Phaseolus vulgaris (common bean)Results agree

2 papers: 0 positive, 2 negative or no effect

1 paper in the same direction as this paper

  1. no effect
See all 2 papers →

Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.