document.write( "Question 1092600: An octapeptide is known to contain four of one amino acid, two of another, two of third.How many different amino acids sequence are pissible \n" ); document.write( "

Algebra.Com's Answer #707278 by ikleyn(52818) $\"\"$ $\"About$

You can put this solution on YOUR website!
.
\n" ); document.write( "Hey, I answered to similar post before.\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "But you sent it again, and it is VERY GOOD, because I changed my mind comparing with my earlier posts.\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "I made my small research in the Internet regarding \"octapeptide\".\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "What I learned in relation to our problem is THIS:\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "

\r\n" );
document.write( "1.  Octapeptide is an line chain of 8 amino acids.\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "2.  These elementary amino acids may repeat in the chain. Repeating is allowed.\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "3.  For our problem it does not matter that there are 4 amino acids of one type, \r\n" );
document.write( "\r\n" );
document.write( "    2 amino acids of the other type and  2 amino acids of the third type.\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "4.  I still didn't find if there are restrictions for the order of placing amino acids in the line.\r\n" );
document.write( "\r\n" );
document.write( "    I suspect that a compehensive answer to this last question is in dark for chemists/biochemists.\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "    I will ASSUME that the problem asks in how many ways 8 different amino acids can be placed in a row if repeating is allowed.\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "    Then the answer is:  in   = 16777216 ways.\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "    Any of 8 in the first position.\r\n" );
document.write( "    Any of 8 in the second position.\r\n" );
document.write( "    Any of 8 in the third position.\r\n" );
document.write( "    ........  and  so  on  .......\r\n" );
document.write( "    Any of 8 in the eighth position.\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "In all,  = 16777216 ways.\r\n" );
document.write( "

\r
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "

\n" );