How do sieve tubes elements group to make sieve tubes

sieve tube elements are the cells of phloem which allow transportation of photosynthates through phloem...
how sieve tube elements form sieve tubes:
sieve tube elements are connected end to end and form a long chain which is called sieve tube,,,,
sieve tube elements are connected with the help of a side chain with the help of peptide bond...also one element has tapering end which easily overlaps with other end of next element to form sieve tube,,,,

Hahaha good one. you ? & oop

Cotton was the very first