Full resolution (JPEG) - On this page / på denna sida - II. The Protein Substances - I. Simple Proteins - B. Albuminoids or Albumoids
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KERATINS., 115
Shell Egg" /
Keratin | Keratin | Keratin | Keratin | Mem- | Mem- nore
from from from from brane brane ( ‘h alovts
Horse- Sheep | Goose Sheep of the of Scyl- cA DRG
hair.! Wool.‘ |Feathers’; Horn.‘ | Hen’s lium aabcae
| | egg.® stellare.®
a4 ee
mepweron. sk... CRT. 4.7 0.58 | 2.6 | 0.45 | 3.9 2.6 | 19.36
Si 7 es Se eee ste 13 4.40 1.8 1.6 3.) | 3.2 2.95
(1 Dope SiR as ane 0.9 2.80} 0.5 4.5 Limi – 5.23
IRS Sg od WE 11.5 B.0 OP LBS Te! el G28 3.26
0 SARs | eee 0.6 0.1 0.4 Lt —- | = —
INSDAPUIC ACI, ....-. 2.5. 0.3 2.3 Lid 2.9 1 ss aia ine 0 —
Glutamic acid ?°.......... 5 ar 12.9 2.3 17.2 8.1 42 —
00 a eee 7.98? 7.3 — Ticdithevi eke ? 5.19
Phenylalanine............ 0.0 0.0 Liv — 3.3 1.08
| 3.2 29 |.3.6 | 3.6 | 0.0 10.6 | 13.59
Oe pe eee eee 3.4 4.4 3.5 OU ues 4.4 –
Prine stritits osu. .e Ls 0.618 —_ — = — Lal —
2 OLUETT 2s 4 eid PES Sage 4.453 — — PAM | — 3.2 —
LLS SSL Gt) RAR RO amar 1.128 — — 0.2 — 3.7 —
Bodies occur in the animal kingdom which form to a certain extent
intermediate substances between coagulated protein and keratin. C.
Tu. MOrNER !! has detected such a body (albuwmoid) in the tracheal car-
tilage which forms a net-like trabecular tissue. This substance appears
to be related to the keratins on account of its solubilities and the quan-
tity of the sulphur (lead-blackening) it contains, while according to its
solubility in gastric juice it must stand close to the proteins. Another
substance, nearly like keratin, is the horny layer in the gizzard of birds.
According to J. HeEpENtIus this substance is insoluble in gastric or pan-
creatic juice, and acts quite like keratin. According to K. B. Hormann
and PREGL,! who call this substance kozlin, it does not yield any cystine
on hydrolysis, or at least not a determinable quantity. According to
others the quantity of cystine is very small. Bucurtaua ’* obtained only
1 Abderhalden and Wells, Zeitschr. f. physiol. Chem., 46.
2 Buchtala, ibid., 52.
* Argiris, ibid., 54.
‘ adiahdad: and Voitinovici, ibid., 52.
5 Abderhalden and Le Count, ibid., 46.
§ Abderhalden and Ebstein, ibid, 48.
7 Korner, ibid., 34 and 42.
§ Pregl, ibid., 56.
* Buchtala, ibid., 74.
0 Abderhalden and Fuchs, Zeitschr. f. physiol. Chem., 57, have shown that the
same variety of keratin, on ageing of the horn structure, betes somewhat poorer
in glutamic acid.
11 See Maly’s Jahresber., 18.
» Se Skand. Arch. f. Physiol., 3; Hofmann and Pregl, Zeitschr. f. physiol.,
Chem.,
13 ieee f. physiol. Chem., 69.
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