a 14.1-kilobase apob mrna codes for apob-100 , and the second mrna , which codes for apob-48 , contains a premature stop codon generated by a single base substitution of cytosine to uracil at nucleotide 6538 , which converts the translated caa codon coding for the amino acid glutamine at residue 2153 in apob-100 to a premature in-frame stop codon ( uaa ) .
C0003593
apob
C0103839
apob-48