linux - reading cat file passing to command not working properly

I have a file containing a list of process is input1 file

proc1
proc2 b
proc3 a

I use the following command to read the file and pass on the content of the file to a variable and then do something

for in in cat `input1`;do 
echo $i
done

It works fine for entries like proc1. But the problem is that it assigns only the proc2 to the variable $i and the also assign b to to $i etc etc .. How can I pass the entire proc2 b to variable $i with the space in between ????

Thanks