Milk is secreted by the cells of the mammary glands. Casein is the main protein found in milk. It is coded by a gene ofa known sequence of nucleotide. In some human females, their mammary glands secrete non functional casein. The following document presents a part of the transcribed gene that codes for functional and nonfunctional casein. |Codon number Nucleotide Sequence 3 СТС CTC 7 TTG TTG 2 4 |Functional casein |Nonfunctional | casein AAT ATT ТАС TTC TTC AAT AAT CTT CTT ТАС Document 2 4- Write using the genetic code table, the amino acids sequence of the two types of casein proteins coded by the above nucleotide sequence. 5-1-Compare the nucleotide sequence coding for the 2 types of casein protein and the amino acids sequence coded by these nucleotide sequences. 5-2-Draw out the origin of producing non-functional protein.

Human Anatomy & Physiology (11th Edition)
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Author:Elaine N. Marieb, Katja N. Hoehn
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5-1 and 5-2
Milk is secreted by the cells of the mammary glands. Casein is the main protein found in milk. It is coded by
a gene ofa known sequence of nucleotide. In some human females, their mammary glands secrete non
functional casein. The following document presents a part of the transcribed gene that codes for functional
and nonfunctional casein.
Codon number
Nucleotide
Sequence
1
TAC
ТАС
3
4
CTT
CTT
TTG
TTG
СТС
AAT
Functional casein
Nonfunctional
casein
TTC
AAT
TTC
CTC
AAT
АTT
Document 2
4- Write using the genetic code table, the amino acids sequence of the two types of casein proteins
coded by the above nucleotide sequence.
5-1-Compare the nucleotide sequence coding for the 2 types of casein protein and the amino acids
sequence coded by these nucleotide sequences.
5-2-Draw out the origin of producing non-functional protein.
Transcribed Image Text:Milk is secreted by the cells of the mammary glands. Casein is the main protein found in milk. It is coded by a gene ofa known sequence of nucleotide. In some human females, their mammary glands secrete non functional casein. The following document presents a part of the transcribed gene that codes for functional and nonfunctional casein. Codon number Nucleotide Sequence 1 TAC ТАС 3 4 CTT CTT TTG TTG СТС AAT Functional casein Nonfunctional casein TTC AAT TTC CTC AAT АTT Document 2 4- Write using the genetic code table, the amino acids sequence of the two types of casein proteins coded by the above nucleotide sequence. 5-1-Compare the nucleotide sequence coding for the 2 types of casein protein and the amino acids sequence coded by these nucleotide sequences. 5-2-Draw out the origin of producing non-functional protein.
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