\texttt and \alltt produce brackets in PDF that can't be copied

Question

The code

\texttt{ \{k\!,0\!,dim\} }

and

\begin{alltt} \{k\!,0\!,dim\} \end{alltt}

both produce a PDF in which copying that text and pasting it elsewhere (such as a text editor or Mathematica or internet browser) produces fk, 0, dimg. This is incredibly disadvantagous when you have a larger amount of code to be copied somewhere. How can I remedy this problem?

Minimal working example:

\documentclass[10pt,reqno]{amsart}
\usepackage{amssymb,alltt}
\begin{document}
\begin{alltt} \{k\!,0\!,dim\} \end{alltt}
\end{document} 

Answer 1

Use T1-encoding. With the default OT1 the braces are taken from the math font:

\documentclass[10pt,reqno]{amsart}
\usepackage[T1]{fontenc}
\usepackage{amssymb,alltt}
\begin{document}
\begin{alltt} \{k\!,0\!,dim\} \end{alltt}
\end{document} 

with T1:

with OT1: