<html><body><div style="color:#000; background-color:#fff; font-family:times new roman, new york, times, serif;font-size:12pt"><div dir="ltr">Hello.</div><div dir="ltr">I have a problem with chimera! I want to combine two different pdb file by chimera , which will be merge into a single model.</div><div dir="ltr">I used the "join models" section from chimera but the "apply" button was inactive and i don't know how i can activate it!</div><div dir="ltr">please help me.</div><div dir="ltr">thank you for your useful software.</div></div></body></html>