Last Updated：2025/12/19
Sentence
All
proteinogenic
amino
acids
(AAs)
are
claimed
to
be
levorotatory
(L-configured).
Nevertheless,
dextrorotatory
AAs
(D-configured)
are
also
found
in
nature
(Gao
et
al.,
2015;
Ollivaux
et
al.,
2014),
for
example,
in
the
organic
material
of
extraterrestrial
comets
(Cronin
and
Pizzarello,
1983),
or,
formed
by
slow
racemization,
in
all
dead
biological
material.
Quizzes for review
All proteinogenic amino acids (AAs) are claimed to be levorotatory (L-configured). Nevertheless, dextrorotatory AAs (D-configured) are also found in nature (Gao et al., 2015; Ollivaux et al., 2014), for example, in the organic material of extraterrestrial comets (Cronin and Pizzarello, 1983), or, formed by slow racemization, in all dead biological material.
音声機能が動作しない場合はこちらをご確認ください
English - English
Word Edit Setting
- Users who have edit permission for words - All Users
- Screen new word creation
- Screen word edits
- Screen word deletion
- Screen the creation of new headword that may be duplicates
- Screen changing entry name
- Users authorized to vote on judging - Editor
- Number of votes required for decision - 1
Sentence Edit Setting
- Users who have edit permission for sentences - All Users
- Screen sentence deletion
- Users authorized to vote on judging - Editor
- Number of votes required for decision - 1
Quiz Edit Setting
- Users who have edit permission for quizzes - All Users
- Users authorized to vote on judging - Editor
- Number of votes required for decision - 1
