Full resolution (JPEG) - On this page / på denna sida - II. The Protein Substances - I. Simple Proteins - A. True Albuminous Bodies - Synopsis of the Most Important Properties of the Different Groups of Albuminous Bodies
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PROTAMINES. Ill
tamine. The carp protamine, cyprinine, occurs in two different modi-
fications, namely, a- and jS-cyprinine. The a-cyprinine yields only little
arginine, 4.9 per cent, but the lysine content is pronounced, 28.8 per cent.
Of the total nitrogen 30.3 per cent exists as Lysine. Kossel and Dakin
have obtained from salmine the following cleavage products, namely,
arginine 87.4, serine 7.8, aminovaleric acid 4.3, and a-pyrrolidine-car-
boxylic (proline) acid 11 per cent, and according to them the salmine
contains about 10 mol. arginine, 2 mol. serine, 1 mol. aminovaleric acid,
and 2 mol. proline. Scombrine contains only arginine, alanine, and pro-
line. According to Kossel, every protamine contains only 2 or 3 mon-
amino-acids (clupeine contains 4) and for every 2 molecules of arginine
cnly 1 molecule of monamino-acid occurs. The above-mentioned pro-
tones (of the salmine group) are symmetrically constituted diarginides
with a monamino-acid—for example diarginylserine, diarginylproline etc.,
—and these diarginides are united together forming the protamine.
Thus according to Kossel in clupeine we can accept the presence of
diarginylalanine, diarginylserine, diarginylproline, and diarginylvaline
(Kossel and Pringle).
The following summary according to Kossel gives a view of the
cleavage products of the protamines thus far investigated:
Alanine
Serine
Valine
Leucine
Arainine
Lysine
Histidine. . .
.
Proline
Tyrosine . . . .
Tryptophane
Scom-
brine.
Salmine.
+
4-
+
+
4-
+
+
Clupeine.
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