k02-10513054-novirachandisa
DESCRIPTION
tugas biokimTRANSCRIPT
![Page 1: K02-10513054-NoviraChandisa](https://reader036.vdocuments.us/reader036/viewer/2022082417/563db819550346aa9a908d05/html5/thumbnails/1.jpg)
Nama : Novira Chandisa
NIM : 10513054
Problems:
I. Evaluate the solubility of the following peptides at the given pH. For each pair, which peptide is more soluble and why? Hint: Evaluate the ionization states of the amino acid functional groups.
pH 7: Gly20 and (Glu-Asp)10
Jawab : Kelarutan suatu protein tergantung pada pH pelarut dan titik isoelektrik dari asam amino tersebut. Asam amino glisin akan bersifat amfoter pada pH 7 sehingga larut dengan baik. Sedangkan (Glu-Asp)10 memiliki struktur yang dapat mengalami resonansi sehingga interaksi dengan air lebih banyak yang mengakibatkan (Glu-Asp)10 larut lebih baik dalam air
II. Match the terms below with the accompanying statements. (More than one term may apply to a statement.)
A. dansyl chloride D. 2-mercaptoethanol
B. phenylisothiocyanate E. cyanogen bromide
C. iodoacetate
1) ___C__ An alkylating agent that reacts with Cys residues.
2) __D___ A reducing agent that carries out reductive cleavage of disulfide bonds.
3) _A____ A reagent used to identify N-terminal residues.
4) __E___ A reagent that cleaves polypeptides into smaller fragments.
5) _B____ A reagent used in sequencing polypeptides from the N-terminus.
III. You have a polypeptide that has been degraded with cyanogen bromide and trypsin. The sequences of the fragments are listed below (using one-letter codes). Is there enough information to derive the complete amino acid sequence of the polypeptide? What further treatments might support the deduced sequence?
Cyanogen bromide treatment:
(1) K
![Page 2: K02-10513054-NoviraChandisa](https://reader036.vdocuments.us/reader036/viewer/2022082417/563db819550346aa9a908d05/html5/thumbnails/2.jpg)
(2) RFM
(3) MLYCRGM
(4) NIKGLM
Trypsin treatment:
(5) FMK
(6) GMNIK
(7) GLMR
(8) MLYCR
Jawab :
CNBr : MLYCRGMNIKGLMRFMK
Tripsin : MLYCRGMNIKGLMRFMK
Ya, informasi cukup untuk menunjukkan urutan. Namun untuk memastikan lebih lanjut harus dilakukan degradasi Edman.